Federal authorities are asking for help to find more than 600 pounds of explosives that were stolen from a pipeline worksite in Lancaster County.

The Bureau of Alcohol, Tobacco, Firearms and Explosives is offering a reward of up to $10,000 for information that leads to the recovery of the stolen explosives and/or the arrest and conviction of those responsible.

A contracting company said about 640 pounds of dynamite and 400 blasting caps were stored inside a locked, truck trailer at the site in Marietta.

The explosives were stolen sometime after workers left the site on Friday. The worksite security company discovered the theft on Monday, after noticing the trailer door was ajar and the locks were missing.

Donald Robinson, Special Agent in Charge, said theft and possession of stolen explosives is a federal crime that is punishable by up to 10 years in prison.

He said anyone with information should call the ATF hotline at 1-888-ATF-BOMB (1-888-283-2662).