Bangkok, Dec. 14 -- Thailand's military on Sunday imposed a curfew in parts of Trat Province, citing the ongoing security situation along the border areas, Xinhua reported.

In an official order, the military said a curfew has been enforced with immediate effect in five districts of Trat Province--Khlong Yai, Bo Rai, Laem Ngop, Khao Saming and Mueang Trat. Residents in these areas have been instructed not to leave their homes between 7:00 PM and 05:00 AM the next day.

Thai media reports said the decision followed an incident late Saturday night in which three M79 grenades were fired at the headquarters of the Marine Corps Task Force in Trat Province. The grenades are believed to have been launched from within Thai territory. No casualtie...