Police need help finding a man they say threatened and robbed a woman with a baby at a bank in Manhattan.

Investigators say 40-year-old Melvin Johnson followed a 35-year-old woman and her child inside a Bank of America on Sixth Avenue in Greenwich Village.

Police say he flashed a silver object and told her to withdraw money.

Police say she gave him $400 from the ATM before Johnson fled on foot..

Police say he's about 6 foot 2 inches tall, 300 pounds, and has brown eyes.

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.