A Laos air force plane believed to be carrying 20 people including the country's defence minister has crashed, Thailand's Foreign Ministry says.
There was no immediate word on casualties, said the Foreign Ministry spokesman, Sek Wannamethee.
He said that the plane took off from the capital, Vientiane, and crashed in the northeastern province of Xiangkhoung, about 470 kilometres away.
He said he was informed of the crash by authorities in neighbouring Laos.
He did not immediately have any other details.
In October, a Lao Airlines ATR-72 turboprop crashed during a heavy storm as it approached Pakse Airport in southern Laos, killing all 49 people on board.