An eye for an eye...
Angola began expelling Congolese migrants from its territory in 2003, mainly from the diamond-rich province of Lunda Norte where they were reported to be mining illegally.
As many as 160,000 had been expelled by October this year, amid allegations of mass rape and brutality committed by Angolan border guards.
Those who are deported to DRC, often return just days or weeks later in search of work. While the UN has been monitoring the situation, the welfare of the returnees has been left largely to Catholic aid agencies.
In July, in response to growing concerns about the alleged ill-treatment of the Congolese by border guards, U.N. staff in Kinshasha contacted its counterparts in Angola who relayed their concerns to Angola's foreign minister Assuncao dos Anjos.
This did not stop the widely-publicised "Operation Clean Up" exercise during which Angola deported more than 2,500 immigrants from the oil-rich enclave of Cabinda in less than three days.
Earlier this month - coincidentally just as DRC started to deport Angolans in retaliation - a team drawn from various agencies including UNICEF, Caritas, the U.N. High Commission for Refugees, the International Organisation for Migration and the U.N.'s mission to the Congo, MONUC, visited the Bas Congo region where most of the expelled Congoloses are deposited and are due to report back on their findings shortly.