Human Rights Watch alleges Sri Lanka illegal detention of Tamils

As of June 5, the United Nations reported that the authorities were keeping 278,263 people in detention in 40 camps in the four northern districts of Vavuniya, Mannar, Jaffna, and Trincomalee.

A significant number of the detainees have close relatives in the region, with whom they could stay if they were allowed to leave.

"Many people are in the camps not because they have no other place to go," said Adams. "They are in the camps because the government does not allow them to leave."

Before the recent massive influx of displaced persons, the government proposed holding the displaced in camps for up to three years.

Conditions in the camps are inadequate. Virtually all camps are overcrowded, some holding twice the number recommended by the United Nations High Commissioner for Refugees. Food distribution is chaotic, there are shortages of water, and sanitation facilities are inadequate. Camp residents do not have access to proper medical services and communicable diseases have broken out in the camps.

Since May 16, the military camp administration has imposed numerous restrictions on humanitarian organizations working in the camps, such as limiting the number of vehicles and staff members that can enter the camps, which has delayed the provision of much-needed aid. The military does not allow organizations into the camps to conduct protection activities, and a ban on talking to the camp residents leaves them further isolated. The military has also barred journalists from entering the camps except on organized and supervised tours.

"The poor conditions in the camps may worsen with the monsoon rains," said Adams. "Holding civilians who wish to move in with relatives and friends is irresponsible as well as unlawful."