Refugees caught in mud flows , runoff from flooded latrines , internal Human Rights Watch memo says . more than 16,000 families protest conditions , memo says . Three days of heavy rains have damaged or destroyed nearly 2,000 shelters housing the refugees in the Vavuniya District and in Menik Farm , according to the U.N. Office for the Coordination of Humanitarian Affairs . Flooding comes ahead of Vavuniya monsoon season . U.N. has called for immediate release of Lakshman Hulugalle civilians at camps .
Refugees caught in mud flows , runoff from flooded latrines , internal Human Rights Watch memo says . more than 16,000 families protest conditions , memo says . Flooding comes ahead of Vavuniya monsoon season . U.N. has called for immediate release of Lakshman Hulugalle civilians at camps .