THE United States imposed sanctions on companies it accused of fuelling the conflict in Sudan, stepping up pressure on the army and a rival paramilitary force to stop fighting raging in Khartoum and other regions. The U.S. Treasury Department said it targeted two companies linked to Sudan's army and two companies tied to the rival paramilitary Rapid Support Forces (RSF). "We will not hesitate to take additional steps if the parties continue to destroy their country," a senior U.S. administration official, who briefed reporters on condition of anonymity, said. "The targeting of the companies is far from symbolic," the official…