Rwanda-backed rebels battling Congo’s army have pushed into a strategic, mineral-rich town in the east, ignoring calls for a ceasefire this week by the Congolese and Rwandan presidents as the M23 rebel group expands its footprint in the conflict-torn African country.

The leader of Rwandan-backed M23 rebels in eastern Congo said on Thursday that a call by Kinshasa and Kigali for an immediate ceasefire "doesn't concern us" as his forces pushed deeper into Congolese territory by capturing the strategic town of Walikale.

After talks in Qatar, the two countries’ presidents said they were committed to an unconditional truce between Congo’s army and a rebel group that Rwanda denies backing.