Thousands of people gathered in the Nigerian oil city of Warri Sunday to witness the expected disarmament of militant leader Government Tompolo, behind years of attacks in the western Niger Delta. Tompolo signed an amnesty agreement with President Umaru Yar'Adua in the capital Abuja late Saturday. Tompolo was expected to be flown by a presidential jet to Warri for a formal laying down of arms at one of his camps in the surrounding creeks.