Those sanctioned include Alkhaleej Bank and Al-Fakher Advanced Works, controlled by the paramilitary Rapid Support Forces (RSF).

The third company, Zadna International, is linked to the Sudanese army, according to the statement from the US Treasury Department on Wednesday.

The statement said all three entities have undermined the peace, security, and stability of Sudan by either laundering money or raising funds from gold exports.

The sanctions are part of measures aimed at stemming the nine-month war.

Over 12,000 people have died and nearly eight million people have fled their homes because of the conflict, according to the UN.

On Tuesday, General Abdel Fattah Al-Burhan the commander of the Sudanese army, called for a full-scale offensive against the RSF.

He added that he was not interested in talks as they were a waste of time.

Both the army and RSF have been accused by the US government and other civil rights groups of committing war crimes, accusations they both deny.