Myanmar has seen a growing number of deadly battles between its military and armed resistance groups since the junta seized power in a coup two years ago. Some of the fiercest fighting has been in this region between the capital Nay Pyi Taw and the border with Thailand. On Saturday, the military's air force and artillery entered the village after the shelling around 16:00 local time (09:30 GMT, and executed villagers they found hiding inside a monastery, the KNDF said.
A video from KNDF - one of several ethnic armies which have joined the fight against the military government - showed at least 21 bodies, including three in the orange robes worn by Buddhist monks, piled up against the monastery. The bodies had what appeared to be multiple gunshot wounds. The video also shows the walls of the monastery peppered with bullet holes.