Another incident targeting postal workers in Western Pennsylvania.
The latest incident occurred late in the afternoon Friday in Upper St. Clair.
Police say a man somehow got into the back of the Upper St. Clair Post Office, showed a gun to an employee, and stole postal keys before running away.
Dave Gealey, U.S. postal inspector team lead for the Pittsburgh area, tells KDKA-TV that criminals are looking to steal postal keys to get into collection boxes.
He says it's the third incident this year in which a local postal worker was robbed.
Anyone with information is asked to contact police.