Police in Manhattan are looking for a man they say pulled a gun on a postal worker.

It happened just before 4 p.m. Tuesday at the Washington Houses on East 102nd Street between Second and Third avenues in East Harlem. 

Police say the man in surveillance video seen above followed a 39-year-old postal worker into the building, then into an elevator.

The victim was delivering packages when police say the suspect allegedly pulled out a gun and demanded keys from the postal worker before running downstairs. 

The man police are looking for was last seen wearing a black jacket with a burgundy hoodie, blue faded jeans and dark sneakers.

Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.