COLOMBO: Tamil Tiger rebels took over a government-run health centre in northeast Sri Lanka and turned it into a political office, the military said on Tuesday. Military spokesman Brig. Daya Ratnayake said the health centre, near the northeastern port of Trincomalee, was closed when two rebels demanded the key from a guard and then set up their office. Ratnayake said the military has lodged a complaint with European observers monitoring a 2002 cease-fire between the government and the rebels. The rebels did not immediately comment on the military allegation. A spokeswoman for the monitoring mission, Tiina Nurmimaki, said monitors have gone to the area to investigate the complaint. Meanwhile, the rebels' administrative chief in the volatile eastern region, Daya Mohan, was arrested Tuesday on suspicion of possessing a stolen vehicle. "He didn't have the relevant papers to prove possession of the vehicle," Ratnayake said. Mohan and his driver were apprehended during a regular check at a security point in government-controlled eastern Batticaloa, 220 kilometres east of Colombo, he said.