DUBAI, United Arab Emirates (AP) - An official UAE security source says a suspicious device discovered in an air cargo shipment in Dubai that was headed for the U.S. contained explosive materials.

The person, speaking on condition of anonymity because of the sensitivity of the issue, said the "explosive device" was found Friday in a courier company's regional hub and originated in a shipment from Yemen.

The source says there has been "close cooperation between several intelligence and security agencies around the world following the discovery of shipments ... containing an explosive device originating in Yemen."

The person says an investigation is under way.