A million dollar masterpiece being transported to New York’s Guggenheim art museum was stolen in transit, when the artwork was "left unattended" in the transport vehicle somewhere in the Scranton, Pa., area last week, FBI officials tell ABC News. The insurer has offered a $50,000 reward for information leading to the recovery of the painting by the Spanish artist Goya, "Children with a Cart," which was being sent from the Toledo Museum of Art to New York’s Guggenheim Museum for a special art exhibit set to open this Friday. "It appears that the person or persons involved knew what they were doing," a FBI spokesperson told ABC News. But the spokesperson added, "There is no reason to believe the people transporting the artwork were involved." THE BLOTTER RECOMMENDS New Clues in Art Heist Mystery Plea Expected in Yale Map Theft Click Here to Check Out More of the Brian Ross Page A statement issued by the Guggenheim Museum said the painting "was in the care of a professional art transport provider." The Philadelphia FBI office is leading the investigation and asks that persons with information regarding the painting contact them directly at (215) 418-4000.