Rwanda-backed M23 rebels said on Monday that they had withdrawn from planned peace talks aimed at resolving a spiralling conflict in the Democratic Republic of Congo after the EU imposed sanctions on its leader and on Rwandan army commanders.

The Rwanda-backed rebels who captured key areas of Congo’s mineral-rich east say they have withdrawn from planned peace talks with the country’s government in Angola.

The Rwanda-backed militia’s decision followed European Union sanctions over three senior Rwandan military officials, five senior leaders of the M23, and a gold refinery announced earlier on Monday, as criticism grows of Kigali’s backing of the group that has seized two major Congolese cities.