Upper Merion Township Police are investigating the theft of 2 dozen firearms - including machine guns and sniper riffles.
The owner of the truck is a firearms dealer who had just left the gun show which was being held at the Valley Forge Convention Center.
He had stopped to have dinner before driving home to Pittsburgh, Pa.
A list of the stolen firearms is being compiled and so far it is believed that twenty four various rifles, including machine guns and sniper rifles, are missing.
The value of the items is in excess of $200,000.
Anyone who information after the theft is asked to contact the Upper Merion Township Police Department at 610 265-3232.