Government security forces defeated Tamil Tiger rebels who were fighting to create an independent state for Tamils in the north and east. Both sides have been accused of serious war crimes and a United Nations report has said that 40,000 civilians may have been killed in the final phase of the conflict.
The party said it will call for an independent international investigation into the alleged wartime abuses to ascertain the truth and obtain compensation for victims.
The U.N. and the United States have called for a credible domestic investigation into the allegations, warning that a failure could strengthen calls for an international probe.
U.N. High Commissioner for Human Rights Navi Pillay, who concluded a visit to Sri Lanka last weekend, said she heard complaints in the north of missing relatives in the war, intrusive military control of civilian lives in education, agriculture and tourism, and acquisition of private land for military camps since the war.
The TNA was considered a proxy for the rebels during the war. Since their defeat it has abandoned separatism.