Officials are suspecting the Separatist Tamil Tiger rebels for the attacks. Maj Gen Perera was the provincial leader of the country's main opposition UNP party. He was one of Sri Lanka's most prominent army officers, and held the command of government forces in the Jaffna peninsula, a Tiger stronghold, in the mid-1990s. The Tamils had accused him of being responsible for hundreds of deaths in Tamil during his period.
The human rights group, Amnesty International, also raised similar concerns. The Tamil Tiger rebels have been fighting for a separate homeland for a quarter of a century and about 70,000 people have been killed in the violence.