BANGKOK -- Thailand's military announced on Sunday the imposition of a curfew in parts of Trat Province, citing the ongoing situation along the border areas.

In an official order, the military said that a curfew was immediately enforced in five districts of the province, namely Khlong Yai, Bo Rai, Laem Ngop, Khao Saming, and Mueang Trat. Residents in these areas are prohibited from leaving their homes from 19:00 to 05:00 the following day.

According to Thai media reports, the military's announcement came in the wake of an incident on the night of Saturday, when three M79 grenades were fired at the headquarters of the Marine Corps Task Force in Trat Province. The projectiles are believed to have originated from within Thailand. No casualties were reported as the grenades landed in an uninhabited area.

This marks the second province to impose a curfew since the latest round of Thailand-Cambodia border clashes erupted. The Thai military had already put a curfew in place in four border districts of Sa Kaeo Province on Wednesday.