Initial reports said that at least four people were injured when bomb attacks hit Narathiwat's Sungai Kolok district and Pattani provinces.
In Sungai Kolok, the bomb attacks took place in two areas, injuring at least three. In Pattani, the explosion seriously injured a volunteer, identified as Isama-e Jetae, 36.
Police rushed to the scene in Yaring district found Isama-e's vehicle partly damaged from the impact of the explosion.
The initial investigation found that the victim parked the car in his garage near his house for about five days. As he was driving the car from the garage, a bomb hidden under the car exploded.