The sanctions include an arms embargo, travel bans, and asset freezes.

The RSF, led by General Mohamed Hamdan Daglo, has been fighting for three years against General Abdel Fattah al-Burhane, the country's de facto leader since a 2021 coup.

One of his brothers, Al-Goney Hamdan Dagalo, "has extended this war by leading RSF efforts to procure weapons and military materiel," the Security Council's sanctions committee said.

It added that Al-Goney had "directly contributed" to the RSF's 18-month siege of the city of El Fasher in North Darfur, home to "nearly two million vulnerable civilians." A UN fact-finding committee has said the violence in El Fasher showed "hallmarks of genocide."

Also sanctioned this week are three Colombians accused of recruiting and supporting Colombian veterans to fight with the RSF across Sudan.

Alvaro Quijano, a retired colonel, plays a "crucial role" in recruiting people who supply "tactical and technical expertise" to the RSF and serve as "infantry and artillerymen, drone pilots, vehicle operators, and instructors, with some even training children to fight," the sanctions committee said.

Quijano is said to have co-founded an employment agency, International Services Agency (A4SI), that helped supply "between 350 and 380 Colombian fighters, mostly retired soldiers" to the RSF, the committee said.

The director and owner of A4SI, Claudia Viviana Oliveros Forero, has also been placed on the sanctions list.

Mateo Andres Duque Botero is accused of financing the deployment of former Colombian military personnel to Sudan, through a company he manages, Maine Global Corp., "with the support of US-based firms."

His work includes "processing payroll payments for Colombian fighters and serving as a foreign exchange intermediary," and in that capacity he has sent "numerous wire transfers, totalling millions of dollars," the sanctions committee said.