CNN reports operators lost contact with the $6.5 million UAV about 3 am Tuesday. US Customs and Border Protection spokesman Michael Friel said the wreckage was located by a government helicopter about three hours later.

No one on the ground was injured, and nothing was damaged — well, except for the UAV… but officials didn’t immediately know the extent of damage to the vehicle.

Investigators are looking into the cause of the downing.

Officials said while it was flying, the Predator B has aided in apprehending nearly 1,800 illegal immigrants, as well as the seizure of over four tons of marijuana.