A protester kicks a tear gas canister launched by police during a protest in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)

SANTIAGO, Chile (AP) — Chilean President Sebastián Piñera on Saturday announced the suspension of a subway fare hike that had prompted violent student protests, less than a day after he declared a state of emergency amid rioting and commuter chaos in the capital.

Soldiers patrolled the streets in Santiago for the first time since the military dictatorship of Gen. Augusto Pinochet ended in 1990, summoned to keep order following protests over a rise in subway fares from the equivalent $1.12 to $1.16. Subway service had been suspended in the capital since late Friday.

"I have heard with humility the voice of my compatriots," Piñera said before announcing that "we are going to suspend" the fare hike.

It was unclear if the rollback would end the demonstrations and rioting.

The protest by students began on Monday when hundreds of young people mobbed several metro stations in Santiago, jumping over or dipping under turnstiles in a fare-dodging protest against the 4% increase in fares.

Chile doesn't produce its own oil and must import its fuel, leading to high prices for gasoline, electricity and elevated public transportation costs. The government said the fare increase was necessary because of rising energy costs, the devaluation of the country's currency and maintenance. But many Chileans are frustrated by rising prices.

By the end of the week the protests had turned violent with thousands of students burning subway stations and damaging dozens of others, and some set fire to a high-rise energy company building. Officials reported 156 police officers and 11 civilians injured and more than 300 people arrested.

On Friday, the operator of Santiago's subway system announced the suspension of service in three of its six lines. Later Friday, it announced the suspension of all six, stranding hundreds of thousands of furious commuters.

Authorities said that in all, 78 stations along with infrastructure and equipment had been damaged in a system that has long been a point of pride for Chileans.

The conservative Piñera vowed that those responsible for the violence "are going to pay for their deeds."

Near midnight, Chile's conservative president declared a state of emergency in affected areas, allowing authorities to restrict rights to assembly and movement. Soldiers were deployed in the streets.

Despite the presence of soldiers and police, thousands of Chileans continued protesting including in cities outside Santiago, not only against public transit fare hikes, but the price of electricity, water and medicines.

By late Saturday, protests had extended to another 20 cities, especially Valparaiso and Concepcion, where states of emergency were declared.

Walmart said in a statement that 60 of its stores in Santiago and six other cities suffered looting.

Police repressed protesters with tear gas, while protesters had set up barricades and looted businesses.

Despite Pinera's lifting of the fare hike, subway and public transportation services remained suspended late Saturday, and the state of emergency was still in place. Authorities imposed a 10 p.m. to 7 a.m. local time curfew for Santiago.

At the San José de La Estrella metro station, mechanical engineer Hugo Millacoy González, accompanied by his young son, said he was protesting the hike "so my son sees that they can't mock the people."

But others expressed fury at the commuter chaos and not being able to return to their homes.

If subway service is still suspended Monday, when many Santiago residents return to work and school, it would create further commuter chaos.

Santiago Metro director Louis De Granges said "there is still no clarity" on when subway service would return to normal.

Until Saturday, Chilean governments of left and right have been wary of bringing soldiers back into the streets since the end of a dictatorship during which thousands of suspected leftists were killed and dissent was ruthlessly crushed.

"Piñera's decision to deploy the military in Chile — a country that experienced a 17-year repressive dictatorship — is troubling and could further destabilize the situation," said Jenny Pribble, associate professor of political science at the University of Richmond. "It also sends a message to Chileans that the parties of the right still see the military, and not democratic process, debate, and dialogue, as the ultimate solution to social conflict."

A pigeon affected by last night's fire at a subway station is touched by a station worker, after a night of protests in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations. (AP Photo/Esteban Felix)
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Buses that were set alight by demonstrators during last night's protests stand on a street in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)
A demonstrator raises a sign that reads in Spanish
Chilean Army soldiers jump from a truck during a protest in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)
Demonstrators run for cover from a police water cannon during a protest in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)
A Chilean Army soldier walks in a subway station, damaged during a protest in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)
A police officer looks inside a subway car, damaged during last night's protests, in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)
A demonstrator is detained by the police during a protest in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)
People travel in a bus painted with graffiti that reads in Spanish
Chilean Army soldier walks in front a mural representing late chilean President Salvador Allende while guarding a subway station during a second day protests in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)
A police officer walks in a subway station that was torched during last night's protests, in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)
The destroyed windows of a subway car lay on the floor during a protest in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations. (AP Photo/Esteban Felix)
Subway advertisement lays on the floor at a subway station, destroy during last night's protests in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations. (AP Photo/Esteban Felix)
Chilean police stand in a subway station that was damaged during last night's protests, in Santiago, Chile, Saturday, Oct. 19, 2019. The protests started on Friday afternoon when high school students flooded subway stations, jumping turnstiles, dodging fares and vandalizing stations as part of protests against a fare hike, but by nightfall had extended throughout Santiago with students setting up barricades and fires at the entrances to subway stations, forcing President Sebastian Pinera to announce a state of emergency and deploy the armed forces into the streets. (AP Photo/Esteban Felix)