When a Queens narcotics captain and his superior officer, an inspector, noticed an arrest in progress in College Point on Wednesday night, they drove closer to assist. The arresting officers had pulled a driver over in their unmarked car, lights flashing, at 111th Street and 14th Road, and had asked for his driver’s license before pulling him out and placing him in handcuffs.

The narcotics officers approached. So, the inspector asked, what unit are you guys from?

The arresting officers did not answer. Instead, they took off running.

Both men are suspected of impersonating police officers, and they remained at large on Friday, the police said. One of the men wore a dark suit, and dropped a gun, a shield and a radio in the car they used, a 2012 Nissan Altima, as he fled, the police said. The two men ran to a waiting Dodge Caravan and sped off.

The police did not say whether any of the items left behind were actual police property or fakes because the case is under investigation.