The NYPD has released surveillance video of a man who allegedly robbed a teenage girl. 
According to police, the suspect got into an elevator at 5210 Broadway with the 14-year-old victim last Saturday. They say he then held the girl at knifepoint and ran away with her bag. 
The suspect is described as being 5 feet 4 inches tall, and is believed to be about 45 years old. 
Anyone with information should call Crime Stoppers at 1-800-577-TIPS