New Delhi, Jan. 4 -- Sudanese army-linked sources say more than 10 South Sudanese were captured fighting alongside the RSF in North Kordofan as Kordofan battles intensify and displacement deepens.

KHARTOUM - Sudanese army-aligned sources say government forces and allied fighters have captured more than 10 South Sudanese nationals they allege were fighting with the Rapid Support Forces, a claim that, if substantiated, could widen an already brutal civil war by introducing a more explicit regional dimension to a conflict that has increasingly spilled across borders and trade routes.

The detentions were reported to have taken place on Thursday in the towns of Kazqil and al-Rayash in North Kordofan, an area that has become one of the confli...