Suspected separatists Thursday killed two Thai security officers and injured eight others in a spate of revenge attacks in the troubled deep South, where more that 2,200 have died in the violence over the past three and a half years, according to DPA. In Pattani, separatists ambushed police escorting teachers to school at 8:00 am, killing one officer and injuring five others in a five-minute gun battle. Elsewhere in the province, a bomb was detonated on a road at 6:00 am when Buddhist monks passed by on their merit-making rounds, injuring one soldier escort, and gunmen spayed an army vehicle with assault weapons' fire, killing one soldier and wounding another. In neighbouring Yala province, a bomb was detonated in a parked motorcycle, injuring two militiamen, police said. "The insurgents are taking revenge on us for killing five of their people in Bannang Sata," said Pattani Police Chief Major General Korkiat Wongworrachat. On Wednesday night Thai soldiers killed five suspected insurgents in a clash in Bannang Sata district of Yala province.