Police said Yayoh Tuhreh, 52, kamnan assistant of Tambon Thunkla, was shot at point blank at the head in the local mosque of Moo 2 village in his tambon at 7.30pm.
The shooting occurred while he was praying with over 30 other villagers.
Witnesses told police that a gunman walked up behind Yayoh, shot him in the head and then sped off on a waiting motorcycle.