Police are on the look out for a pair of serial-robbers in the Bronx. The duo (which the NYPD believe maybe the pair in the surveillance video to the left) are thought to be behind more than 18 robberies since July 10. Striking in the Bronx neighborhoods of University Heights, Forham, Kingsbridge Heights and Norwood their standard MO is to rob in elevators:

Police said the two men seem polite at first, holding the elevator for apartment residents. But once inside, they rob tenants while holding a gun to their heads, NewsChannel 4 reported.

Uhm, isn't this exactly why security cameras are installed in elevators? In the meantime, if you know anything about these guys, please call 1-800-577-TIPS.