BROOKLYN - Police are asking for the public's help searching for a suspect in a string of subway robberies.

They say Richard Brown is responsible for several robberies in Brooklyn and Queens. 

Police say Brown robbed two victims on the A, F and J trains, stealing their cellphones and credit cards. According to police, Brown told victims he was armed.

Police ask anyone with information to call Crime Stoppers at 1-800-577-TIPS.