Fighters from the largest Rwandan rebel group based in Democratic Republic of the Congo have left their bases and returned home in order to disarm.
The FDLR used to control much of eastern DR Congo
Seraphin Bizimungu, known as General Amani, and 185 of his fighters crossed the border and were met by Rwandan army officers and demobilisation officials.
The rebels were formed from ethnic Hutu extremists, who fled to DR Congo after the Rwandan genocide of 1994.
Their presence in DR Congo has led to years of fighting in the region.
Rwanda has twice invaded DR Congo, saying it is trying to wipe out the rebels.
These Democratic Liberation Forces of Rwanda (FDLR) fighters - who were formed from Hutu extremists known as the Interahamwe - were supposed to be disarmed under a 2002 peace deal.
In September, General Amani announced that they would lay down their arms, and work towards being re-integrated into Rwanda society.
He was met at the border by Jean Sayinzoga, the head of the National Commission for Demobilisation and Reintegration.
Some 800,000 Tutsis and moderate Hutus were slaughtered in the 1994 genocide.