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A Downey Police officer was shot and wounded Thursday while working an undercover narcotics operation in San Bernardino.

Several officers had followed a narcotics suspect to a home in the 1000 block of East Rialto Avenue.

Officers surrounded the home around 6 p.m. and were preparing to move in when they came under fire by someone at the residence, according to police at the scene.

Downey officers fired back, killing the gunman.

During the gun battle, an unidentified officer was wounded.

Mary Beth McDade reports for the KTLA 5 News at 10 on Thursday, Nov. 13, 2014.