Hundreds are missing and an unknown number feared dead after a partly built hydropower dam in southeast Laos collapsed after heavy rain and sent a wall of water surging through six villages, state media and contractors said Tuesday. Laos News Agency said the accident happened on Monday evening near the border with Cambodia, releasing five billion cubic metres of water -- more than two million Olympic swimming pools. Communist Laos is traversed by a vast network of rivers and several dams are being built or planned in the impoverished and landlocked country, which exports most of its hydropower energy to neighbouring countries like Thailand.



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