Thieves stole 3,600 new Apple iPad minis — worth $1.5 million — from a cargo building at JFK airport.

According to a NY Post report, the crooks thieves shortly before midnight on Monday and used one of the airport’s own forklifts to load two pallets of the tablet computers into a truck.

They might have gotten more, the report says, but they drove off, leaving three more pallets of the Apple tablets behind after they were challenged by an airport worker returning from dinner.

The report says that investigators suspect it may have been an inside job, and they have been questioning airport workers and given three of them polygraph tests.

The crooks arrived at Building 261 around 11 p.m. in a white tractor trailer marked with the name CEVA on the side, according to the sources. They pulled up to the side of the airport building that faces onto a street and has less security than the other side, which is accessible from the airport tarmac, says the report, additing that sources believe someone let them into the area and then let them out after they grabbed the iPads.

They grabbed about 3,600 of the minis that were being shipped by a company called Cargo Airport Services, which said the iPads had just arrived from China and were destined for locations around the U.S.