Hutu

The countries share a similar language and ethnic make-up - with Tutsi and Hutu communities often vying for power - and both have suffered terrible ethnic-based massacres.

Tutsis, Hutus and other ethnic groups lived in the Rwandan kingdom and had done so since at least the 19th Century.

Afterwards many Hutus fled into DR Congo, including some involved the genocide.

Fearing reprisals, an estimated one million Hutus then fled across the border to what is now DR Congo.

He has said Rwanda is in danger from Hutu rebels in DR Congo and has dismissed any threat of sanctions.