FILE - In this Friday, July 6, 2018 file photo specialist team members in military protective suits during Novichok nerve agent clean-up operations in Salisbury, England.  British police confirmed Thursday Aug. 15, 2019, that a second police officer who responded to the March 2018 nerve agent attack in the English city of Salisbury was exposed to the agent Novichock, after tests confirmed the exposure. (AP Photo/Matt Dunham, File)

LONDON (AP) — British police say a second police officer who responded to a March 2018 nerve agent attack in the English city of Salisbury was exposed to the agent Novichock.

Sergei Skripal, a Russian spy turned double agent for Britain, and his daughter Yulia spent weeks in critical condition after being exposed to Novichok. Police officer Nick Bailey also was sickened.

The Metropolitan Police force said Thursday that another officer showed signs at the time of having been exposed to a "very small amount" of Novichok, and that tests had now confirmed it.

Months after the attack, a local man found a perfume bottle containing traces of the discarded nerve agent. He became severely ill and his girlfriend died from the exposure.

Britain blames Russian intelligence for the attack. Moscow denies involvement.

FILE - In this file photo dated Monday, March 12, 2018, a police tent covers the area where former Russian double agent Sergei Skripal and his daughter were found after being exposed to a