DERNA, Libya: Libyan authorities have opened an investigation into the collapse of two dams that caused a devastating flood in a coastal city as rescue teams searched for bodies, nearly a week after the deluge killed more than 11,000 people. Heavy rains caused by Mediterranean storm Daniel caused deadly flooding across eastern Libya last weekend. The floods overwhelmed two dams, sending a wall of water several meters high through the centre of Derna, destroying entire neighbourhoods and sweeping people out to sea. Since 2014, eastern Libya has been under the control of Libyan National Army chief General Khalifa Haftar. But there was no warning about the dams, which collapsed early Monday as most residents were asleep in their homes.