The Rhode Island attorney general’s office is investigating the shooting of an 18-year-old man by an off-duty Pawtucket police officer Wednesday night.

While driving home on I-95 from an assignment, Pawtucket Police Officer Daniel Dolan encountered a black Audi sedan with three people inside, according to a statement released Thursday afternoon from the attorney general’s office, the state police, and West Greenwich police. Eventually, the two cars ended up in the parking lot of a West Greenwich pizza shop, where Dolan “attempted to detain the driver of the Audi,” the statement said.

Dolan then shot the driver of the Audi, police say. 

"The round struck the 18-year-old in his arm,” said West Greenwich Police Chief Richard Ramsay. “Non-life threatening injuries. He was transported to Rhode Island Hospital where he was held for observations."

Ramsay says it's not known why Dolan was trying to detain the driver, whose identity has not been made public.  

The circumstances of the shooting remain under investigation, according to the attorney general’s office.  

“The officer was very cooperative during the investigation (Wednesday) evening,” Ramsay said. “We’re hoping that the officer is okay, also.”

Dolan was placed on administrative leave, Pawtucket Chief Tina Goncalves said.