A Ugandan policeman raises his weapon and a stick as he instructs residents to run along Wandegeya street in the capital Kampala September 12, 2009. Security forces in Uganda clashed with rioters for a second day on Friday over a row between the government and the kingdom of Buganda. Violence has been triggered by land and power disputes between Ugandan President Yoweri Museveni's government and leaders of Buganda -- one of Uganda's four ancient kingdoms.