Suspected Muslim militants have shot and killed a teacher in southern Thailand, where religious and anti-government tensions have resulted in hundreds of deaths since January.

Authorities say the victim was gunned down Friday in Yala province. No arrests have been made.

Investigators say the shooting may be the latest revenge killing for the recent deaths in government custody of at least 87 Muslim protesters. Several died in clashes with authorities, but the rest are believed to have suffocated while crammed into police trucks.

The revenge killings have also included two beheadings.