Six Thai soldiers assigned to protect teachers were slightly wounded Monday when a bomb planted by suspected separatists exploded outside a school in the country's south, police said.
The troops suffered minor injures to their chests and ears in the mobile phone-triggered blast in Narathiwat province, which left a small crater in the ground outside an elementary school.
Schools and teachers are frequent targets of attack, because militants see the education system as an effort by Bangkok to impose Buddhist Thai culture on a region that is mainly Muslim and ethnic Malay.
Fifty-five government-run schools in the far south were temporarily closed down in July after a principal was shot dead by separatist rebels.
More than 3,400 people have been killed since the unrest broke out in January 2004 in the south, which was an autonomous Malay sultanate until Thailand annexed it in 1902, provoking decades of tension.