Tamils in Colombo "without a valid reason" are being sent back to their villages, Sri Lanka's police chief said last Friday.
Hundreds of Tamils, many from poor rural areas, live in boarding houses in Colombo while they work, search for jobs or seek employment abroad.
Many Tamils in Colombo complain they are being deliberately targeted by the security forces, detained and searched as the military conflict with the LTTE heats up.