OLNEY (WTXF) - Philadelphia Police are trying to track down a man they say uses an app to arrange meetings online to rob people.
On two occasions in Olney, they say the man arranged to meet up with people through the website offerupnow.com to buy a phone.
According to police, the man arranges meetings phones online, then shows a gun and robs them.
Surveillance video released by police shows the suspect they're looking for.
Investigators say in both cases, the suspect showed a gun and stole their devices.
If you recognize him, you are urged to call police.