4 men wanted for robbery, sex assault

Police are looking for four men in connection with a robbery and sexual assault in the Bronx on Monday. 
The NYPD released surveillance video of the suspects, who allegedly followed a man to his apartment on 143rd Street and forced their way in. 
Once inside, the suspects threatened the man with a gun. Investigators say a woman inside the apartment was forced into a bedroom and sexually abused. 
The men got away with money, cellphones and keys. 
Anyone with information is urged to call Crime Stoppers at 1-800-577-TIPS