The helicopter was returning to its base after a flood relief mission when it went missing.
The Thai army said it was searching for a military helicopter that went missing today in northern Thailand with five people on board, including a major general.
The UH-72 light helicopter disappeared from radar at around 10.30 a.m. (0330 GMT) around 30 minutes into its flight, said Lieutenant General Somsak Ninbanjerdkun, Third Area Army commander overseeing Thailand's north.
Among those on board was Major General Nopporn Ruanchan, commander of the army's 4th Infantry Division, he said.
"The helicopter is still missing," junta spokesman Winthai Suvaree said today.
The helicopter was returning to its base in Phitsanuloke from a flood relief mission in the Pai district near the border with Myanmar, Somsak said.
© Thomson Reuters 2016