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.

Rwanda has said international sanctions will reduce the likelihood of peace with M23 rebels in the Democratic Republic of the Congo (DRC), after the United Kingdom said it would pause some bilateral aid and impose other diplomatic sanctions on Kigali.

The UK says it will also suspend future defense training assistance and demands that Kigali withdraw its troops from Congo.

Britain on Tuesday said it would pause some bilateral aid to Rwanda and impose other diplomatic sanctions on Kigali over its role in the conflict in neighbouring Congo, a move Kigali termed "punitive".

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.

The UK's decision to suspend some aid to Rwanda is "punitive", authorities in the East African country have said. In a statement, the UK said it was against Rwanda's support for the M23, a rebel group that has captured swathes of eastern Democratic Republic of Congo in a deadly uprising.