Thai policemen inspect the site of a roadside bomb attack by suspected militants on a vehicle carrying army rangers in Thailand’s restive southern province of Narathiwat yesterday.

DPA /Bangkok 

Five Thai soldiers were killed and one critically injured yesterday when suspected separatist militants detonated a car bomb, the latest in a string of attacks in the southern region.

Officials said the soldiers were in a truck in Raman district of Yala province, 805 kilometres south of Bangkok, when they were blocked by a pickup truck at about 7am.

As they approached, militants hiding nearby detonated explosives in the vehicle.

The insurgents stole five M-16 rifles and fled, Lieutenant General Udomchai Thammasarorat said. “We had been warning local authorities to be prepared for attacks by insurgents,” he said. “We are on alert all the time, but today (the insurgents) had a chance and we failed to stop them.”

On Tuesday, four fruit merchants were shot dead in an attack police said was aimed at intimidating civilians and forcing non-Muslims to leave the three Muslim-majority provinces of Yala, Pattani and Narathiwat.

The militants are seeking independence from predominantly Buddhist Thailand. About 5,300 people have been killed in bombings, shootings, beheadings and arson attacks since the long-running insurgency intensified in 2004.