By Kim Glovas

PHILADELPHIA (CBS) — Philadelphia police say an elderly Kensington man was robbed inside of his home in the middle of the day by men posing as PGW workers.

It happened at about quarter after 12 Thursday afternoon near the intersection of North Tioga and Emerald Streets.

Police say the 87-year-old man heard a knock at the door. He asked who it was, and a voice said there was a gas leak.

The homeowner opened the door and four men forced their way inside.

The robbers took $1200 in cash and a cell phone.

The suspects were last seen walking northbound on Emerald Street.