Republican and Democratic US senators are calling for a strong response from President Donald Trump's administration after the paramilitary Rapid Support Forces seized new territory in Sudan, reportedly attacking civilians.

The growing calls came as the UN chief Antonio Guterres called for an end to the violence, after reports that more than 460 people were shot dead in a maternity hospital in the recently seized city of El-Fasher.

Republican Senator Jim Risch of Idaho, chairperson of the Senate Foreign Relations Committee, called for the US to officially designate the RSF as a foreign terrorist organisation.

"The horrors in Darfur's El-Fasher were no accident — they were the RSF's plan all along," he said in a statement on X on Tuesday.

"The RSF has waged terror and committed unspeaka

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