A government informant was shot dead in Pattani's Sai Buri district on Monday morning, police said.
Pol Col Asi Umayi, the Sai Buri police chief, said the attack occurred about 11am.
According to witnesses, the man, identified later as Abdulhami Saha, 45, of village 5 in tambon Tabing, was travelling on a motorcycle on the Kadunong-Kala road in tambon Kadunong when the pillion rider of another motorcycle opened fire at him with a pistol.
Abdulhami, who was an informant for the authorities, was died on the spot.