San Luis, Arizona

The U.S. State Department issued a security alert for Mexicali, Mexico, suspending government travel and consular services in the border city over an unspecified "potential threat." The alert has unsettled communities along the Arizona-Mexico border, even as conditions at nearby ports of entry, including San Luis, remained calm and normal.

Mexican President Claudia Sheinbaum said the warning, based on U.S. intelligence, involves a potential criminal group, though details remain vague from both governments. The U.S. is advising citizens in or traveling to Mexicali to avoid government buildings, seek shelter if an incident occurs, and notify family of their safety. Border residents with family in Mexicali reported anxiety and difficulty reaching relatives, while some travelers noted increased military and law enforcement presence on the Arizona side. As of Tuesday evening, the alert had not disrupted crossings in Arizona or California, with officials monitoring the situation closely.