Rwanda's President Paul Kagame said he agreed with the U.S. government on the need for a ceasefire in eastern Congo but gave no indication of bowing to calls for Rwandan troops and the M23 rebels they support to withdraw from Goma.

U.S. Secretary of State Marco Rubio told Rwandan President Paul Kagame on Tuesday that Washington was "deeply troubled" by escalation in the conflict in the Democratic Republic of Congo, particularly the fall of the city of Goma to Rwandan-backed rebels.

Rwandan President Paul Kagame has agreed to the need for ceasefire negotiations and peace talks with the Democratic Republic of Congo, South African President Cyril Ramaphosa wrote in a post on X in Monday night.

The rebels, which Rwanda denies supporting, have long been funded at least in part by the illicit mineral trade.

The leaders of DR Congo and Rwanda are meeting at an emergency East African summit in Kenya on Wednesday as M23 rebels, backed by Rwandan troops, tighten their grip on the strategic eastern city of Goma.

Rebels seized the airport of east Congo's largest city, Goma, on Tuesday, potentially cutting off the main route for aid to reach hundreds of thousands of displaced people, after capturing the city in an offensive that left dead bodies lying in the streets.