International sanctions against Rwanda will reduce the incentive for Kinshasa to engage in peace talks with M23 rebels who have made lightning advances in eastern Congo this year, a proscribed Rwandan minister has said.

The UK will soon impose sanctions on Rwanda over its alleged support for the M23 rebel group, which has seized territory in eastern Congo, including key cities and mineral-rich areas. Britain will introduce sanctions soon against Rwanda over fighting in neighbouring Congo, a minister in the UK Foreign Office told Reuters on Monday.

The UK has paused some aid to Rwanda and imposed diplomatic sanctions over its alleged support of the M23 group in Congo's conflict. While Rwanda denies backing the group, the UK demands a withdrawal of Rwandan troops from Congo and encourages dialogue as a political solution.