A UPS plane en route to Houston has made a safe emergency landing in Kentucky after a report of smoke in the cockpit.

UPS spokesman Mike Mangeot told The Courier-Journal that the two pilots on board the plane were not injured. He said the plane made the safe landing in Louisville on Tuesday evening after departing from the city. He said after the plane landed, it was taken to a maintenance hangar where crews are trying to determine the cause of the smoke.

Mangeot says the packages en route to Houston will be sent as soon as possible.