PHILADELPHIA (CBS) — Police are searching for two gunmen who they say opened fire on officers in North Philadelphia.

It happened around 10 p.m. Sunday at 13th and York Streets.

Authorities say two officers were standing outside a vehicle speaking to a passenger inside about an alleged cell phone theft. That’s when, police say, two men approached from behind the vehicle and one of the officers noticed a red laser dot on his shirt indicative of a firearm with an attached laser being pointed at him. Police say the two officers heard multiple gunshots, retreated, and one of the officers drew his weapon and fired six times in the direction of the gunmen.

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Investigators say the two suspects fled on foot with no indication that either man was struck by police gunfire.

Police did recover a firearm magazine containing six rounds in the rear driveway on the 2300 block of North 13th Street.

Police describe the suspects as two black men; one was wearing a white T-shirt and pants, and the second male was wearing a black hooded sweatshirt.

Anyone with information is asked to contact police.