Police said the accident happened at 7pm on the Pattani-Narathiwat Road in front of the Kruese Mosque in Ban Kruese village, Tambon Tanyonglu, Mueang ditrict.
Side cart driver Wansukree Samoh, 38, was crushed by the APV against a power pole and died of multiple injuries.
Three injured side cart passengers were identified as Masakree Sama-ae, 18, Nuriam Taleh, 20 and Patimoh Abiu, 57. They were taken to Pattani Hospital.
Witnesses told police that it was raining at the time of the accident and the four were leaving a noodles restaurant when the speeding APV lost control at the curve of the road and hit the side cart.
Police said the three passengers saw the incoming APV so they jumped down the cart and narrowly avoided the crash but sustained their injuries in their fall.
The APV belongs to the Pattani Taskforce, whose commander, Maj Gen Jatuporn, rushed to the scene and gave Bt20,000 to the family of the dead man and Bt10,000 to each of the injured.
He also pledged to give Bt100,000 and other help to the cart driver’s family.