Many of those being ordered to leave have complained of mistreatment on the part of the forces carrying out the deportations.
Congo's interior minister, Richard Muyej Mangez, said today at a news conference in Kinshasa that authorities there now were opening investigations into the allegations made by the deportees.
He said Congo had no plans to pursue reciprocal actions against citizens from Republic of Congo however.
Authorities in Republic of Congo maintain that the deportees lack the proper immigration papers to stay in Brazzaville.