Two soldiers were killed while one soldier and one student were wounded in a bomb ambush on Tuesday in the restive southern province of Yala.

The explosion occurred late Tuesday morning at a security booth at a school in the Yala's provincial seat while five members of Yala Special Task Force 11 were providing security in the school.

The bomb immediately killed two soldiers at the scene.

As they were sitting near the security booth, the explosive device was triggered by a radio signal.

The bomb disposal unit found fragments of the homemade bomb which was built in a gas cylinder and buried near the scene. The powerful explosion caused a two meter wide and one meter deep hole.

Police is investigating and suspected the Muslim militant.

More than 5,000 people have been killed and more than 9,000 injured in over 11,000 incidents, about 3.5 incidents a day, in Thailand's Muslim, ethnic-Malay dominated three southern border provinces -- Yala, Pattani, Narathiwat and four districts of Songkhla -- since separatist violence erupted in January 2004, according to Deep South Watch, which monitors the regional violence.