Warning signs appear on Mexican beach declaring area restricted by U.S. as Mexico rejects Trump offer to strike cartels

Mexican President Claudia Sheinbaum on Tuesday ruled out allowing U.S. strikes against cartels on Mexican soil, a day after President Trump said he was willing to do whatever it takes to stop drugs entering the U.S. Meanwhile, Mexican and American diplomats were trying to sort out what may have been an actual U.S. incursion.

On Monday, men arrived in a boat at a beach in northeast Mexico and installed some signs signaling land that the U.S. Department of Defense considered restricted.