A fleeing motorcyclist shot dead a pursuing policeman in Pak Chong district of Nakhon Ratchasima on Tuesday night.
Teams of police were hunting down the shooter on Wednesday.
The fatal shooting occurred on a road to Nong Noi and Nong Makha villages. It was reported around 9.35pm on Tuesday.
Police and rescue workers sent to the scene found a traffic patrol officer at Pak Chong station unconscious on the road near his fallen motorcycle. He had been shot several times in the face. Medics performed CPR and used a defibrillator before rushing him to hospital, where he was later pronounced dead.
A woman told police she saw a man riding a motorcycle at high speed with a pursuing policeman on a motorcycle close behind him. Shortly after, she heard a series of bangs but did not realise they were probably gunshots.
She was on her way home and then found the patrol officer lying on the road with blood on his face. She immediately called police.
Police were searching for the killer, and examining recordings from surveillance cameras along the road.
