Foreign fighters and support networks are fuelling the conflict in Sudan and worsening violence against civilians, a UN-backed investigation warned Thursday.

The United Nations' independent fact-finding mission on Sudan said foreign involvement was strengthening the military capabilities of the country's warring parties, enabling increasingly sophisticated military operations, with devastating consequences for ordinary people.

Since April 2023, the conflict between Sudan's army and the paramilitary Rapid Support Forces has killed tens of thousands and forced millions to flee their homes.

In a report, the probe documented the recruitment, training and deployment of foreign personnel to support the RSF, with transnational entities also facilitating the transfer of weapons, ammunition, military technology and logistical support.

It also said there were reasonable grounds to believe that the regular army used foreign-supplied drones in its operations that harmed civilians and civilian infrastructure.