The Democratic Republic of Congo's foreign minister on Friday accused Rwanda of illegally occupying part of its territory, after the M23 rebel group captured the eastern Congolese city of Goma.

Rwanda is illegally occupying the Democratic Republic of Congo and attempting to orchestrate regime change, the country's foreign minister has told the BBC. Thérèse Kayikwamba Wagner said the world had allowed Rwandan President Paul Kagame decades of impunity and failure to hold him accountable for violating international law.

The US is feeling pressure to intervene after its embassy in Kinshasa was attacked on Tuesday by anti-M23 offensive protesters in eastern DRC.

The United Nations expressed deep concern at reports of M23 rebels and Rwandan troops advancing south towards the Congolese city of Bukavu on Thursday, as the militants sought also to assert their control over east Congo's largest city Goma.

Rwandan President Paul Kagame blasted criticism of his country's role in eastern Democratic Republic of Congo where rebels his government backs have seized its largest city, saying Kigali is prepared for "confrontation" if necessary.