At least 20,000 internally displaced persons (IDPs) in northern Uganda were left homeless after a rainstorm wrecked thousands of grass-thatched huts in their camp in the district of Gulu, relief agencies in the area said on Monday. "Three people were injured while about four thousand huts had their roofs blown off when a strong storm swept through Pabbo IDP camp on Sunday evening," Coreen Auma of the Norwegian Refugee Council (NRC), said by phone from Gulu. Pabbo camp, situated about 400 km north of the capital, Kampala, is home to 62,000 people displaced by the 18-year old war between government forces and the Lord's Resistance Army (LRA).