Police officers got into a shootout responding to a robbery in Chelsea early Friday morning.

It happened at 2:50 a.m. on West 21st Street at 6th Avenue.

Plainclothes officers who were wearing NYPD windbreakers were working inside Club Doux when a bouncer told them a robbery was taking place in front of the club.

When the officers went outside and tried to intervene, police said, the suspects fired at them.

The officers returned fire. No one was struck.

Two suspects fled in a silver Audi Sedan last seen heading westbound on West 21st Street, towards 7th Avenue.

The suspects were generally described as wearing black hoodies.

Police found shell casings outside the nightclub.

This is the same location where a man was shot and a police cruiser struck by gunfire last week, on July 18.

West 21st Street was closed Friday morning between 5th and 6th avenues, and 6th Avenue was closed at 20th Street, for the investigation.