A burst dam on the outskirts of the Indonesian capital Jakarta has has claimed the lives of at least 50 people. The number of victims is expected to rise as police and rescue services continue to search the area. Several houses were completely swept away and around 400 engulfed by the floods.The dam on Lake Situ Gintung, southwest of Jakarta, broke in the early hours while most people were sleeping. Although a siren did sound, witnesses say the speed of the water was like being hit by a tsunami and there was little anyone could do. Several hours of heavy rain in the area are thought to have overloaded the lake causing the dam to burst. Survivors have been moved to higher ground while the rescue operation continues.