Thai authorities seized a cargo aircraft carrying tons of weapons from North Korea

il76aThailand has seized a cargo plane refuelling in Bangkok airport, which it says was carrying weapons from North Korea to an unknown destination.

The five crew members were also detained. 

Local media say about 40 tons of weaponry were found aboard the chartered plane, a Soviet-designed Il-76.

Rocket-propelled grenades, missiles and other weapons were found aboard, military investigators said.

The pilot told Thai authorities the aircraft was headed to Sri Lanka, but its final destination was unknown, according to Panitan Wattanayagorn, a spokesman for the Thai prime minister.