A ten-year-old girl was killed and many others were injured in the latest attack in Pattani's Sai Buri district.
Initial investigation showed that the rangers were on the way back from providing security at a mosque and were passing houses when the bomb went off.
The blast killed Itima Sajeh, 10 at the scene and injured three others villagers including a seven-year-old and a 18-year-old girls. They were bystanders. Two rangers were also wounded.