Pol Lt Col Mana Sukcharoen, the Nong Chik police chief, said Yapa Duramae, 62, of Ban Bang Than in tambon Bang Khao of Nong Chik district, was attacked by gunmen about 6am on Don Yang - Bang Khao road, about 20 metres from the mosque.
Yapa was hit by several bullets and seriously wounded. He was rushed to Nong Chik hospital but pronounce dead on arrival.
Ten spent M16 ammunition shells were recovered from the scene by police.
Police were investigating.