THE BRONX - Police are trying to catch a serial robber who is targeting cellphone stores on the same Bronx block.

According to investigators, the suspect was caught on surveillance video holding up a Boost Mobile at gunpoint on Webster Avenue. They say it's the second time the same clerk has been robbed in two weeks.

The clerk at a Simple Mobile store just two doors down saw the video and says he was robbed by the same gunman more than a week ago.

Both stores plan on installing extra security measures such as automatic locks and panic buttons. Both clerks also want increased police presence in the neighborhood.