The officers were on patrol in Yala province when their vehicle was overtaken by a pickup carrying the gunman, the Thai news agency MCOT reported Wednesday.
Col. Pramote Prom-in, a spokesman for the 4th Region of the Internal Security Operations Command, said the gunmen opened fire, killing all the officers. He attributed the ambush to a crackdown on oil smuggling in the region.
The attack occurred one day after two police officers were killed in a bomb blast at a school security guard booth in the same province.
Notable deaths of 2014 [PHOTOS]