The United States has stopped issuing new worker visas for commercial truck drivers, Secretary of State Marco Rubio announced on Thursday. The freeze takes effect immediately and applies to all categories of visas used by foreign drivers to operate heavy-duty trucks in the country. Rubio said the measure is intended to address growing safety risks and protect domestic employment. “The increasing number of foreign drivers operating large tractor-trailer trucks on US roads is endangering American lives and undercutting the livelihoods of American truckers,” he wrote. The decision comes nine days after a crash on Florida’s Turnpike that killed three people. Prosecutors have charged Harjinder Singh, an Indian national who entered the country illegally in 2018 but later obtained a California commercial driver’s license, with three counts of vehicular homicide after his truck jack-knifed during an illegal U-turn. Thursday’s order is the latest Trump-administration move to curb the inflow of foreign labor. Rubio did not say how long the moratorium will last or whether exemptions could be granted, leaving trucking companies that rely on immigrant drivers uncertain about future staffing.