Indonesia's chief security minister will lead a top-level delegation to Finland to resume talks this week with rebels from tsunami-hit Aceh province, an official close to the negotiating team said on Tuesday. The tsunami disaster, which has killed more than 173,000 people in the north of Indonesia's Sumatra island, has prompted renewed efforts to resolve a sporadic rebellion that has killed 12,000 people since 1976. Former Finnish president Martti Ahtisaari and his Crisis Management Initiative (CMI) group will mediate talks between Indonesia and the Free Aceh Movement, better known by its initials GAM. "The delegation will leave on Wednesday afternoon. They will be there for five days," the government official, who declined to be named, told Reuters, adding the delegation will be led by chief security minister and former military chief, Widodo Adi Sutjipto. The team includes Foreign Minister Hassan Wirayuda, Justice Minister Hamid Awaluddin and a former Aceh military commander.