Federal investigators need help finding a man who robbed a southwest Houston bank Thursday.

FBI officials said the man walked into the Comerica Bank at 2337 West Holcombe at around 1:05 p.m.

The man initially pretended to conduct legitimate bank business, then handed the teller a note demanding cash, investigators said. He threatened to pull out a weapon.

The teller handed over an undisclosed amount of cash and the man fled, detectives said.

The robber was described as black, 20 to 25 years old, 5 feet 8 inches to 5 feet 9 inches tall with an average build, a light complexion and clean-shaven. He wore a black business suit, white shirt, black tie, black sunglasses and a Rice University baseball cap.

This was the second robbery of a Houston Comerica Bank Thursday, however investigators do not think the two robberies were related.

Anyone with information is asked to call Crime Stoppers at 713-222-TIPS.