A police officer conducting surveillance escaped injury Monday after a man armed with a rifle fired into an unmarked police car, authorities said.

The Michigan State Police Homicide Task Force and the department’s Special Investigation Section detectives are investigating the shooting, which occurred about 7:35 a.m., when the undercover Dearborn officer was approached by the man with the rifle.

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"The suspect shot into the unmarked police vehicle and ran," a Michigan State Police public information officer said on Twitter.

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"The officer was able to leave the scene and was not hurt. Currently, detectives have two suspects in custody and are in the process of interviewing them," tweets said.

Last September, two Detroit residents were charged after a Michigan state trooper was shot while conducting surveillance with other members of a narcotics unit.