US Issues Security Alert in Mexico’s Mexicali, Suspends Consular Activities

The United States issued a security alert for Mexicali, the capital of Mexico’s Baja California state, and temporarily suspended U.S. government activities and official travel in the border city after receiving information about a “potential threat.” The warning, issued through the U.S. Consulate General in Tijuana on August 24, took effect on August 25, with Washington not publicly disclosing the nature of the threat or its intended target.

The alert advised American citizens in Mexicali to avoid government buildings, remain aware of their surroundings, follow instructions from Mexican authorities and seek shelter if an incident occurs. Mexican President Claudia Sheinbaum said the warning was based on information from U.S. agencies about the possible activity of a criminal group, but said Mexico had received no further details about a specific threat.

Mexico’s federal Security Cabinet later said authorities had not identified evidence of a specific or imminent risk to the population. Nevertheless, federal, state and municipal forces increased patrols, surveillance and preventive security operations across Mexicali. Baja California Governor Marina del Pilar Ávila said security measures would be reinforced in the state capital. The city remained calm during the day.

The warning came just days after Mexican authorities, using intelligence shared by the U.S. Drug Enforcement Administration (DEA), seized 120 kilograms of fentanyl pills, equivalent to more than four million doses, from a property in Mexicali linked to Los Rusos, a criminal faction associated with the Sinaloa Cartel. Authorities also seized a firearm and vehicles.

The timing has raised concerns that the U.S. warning could be connected to possible retaliation following the drug operation. Mexican media, citing information attributed to DEA-linked sources, reported that suspected members of Los Rusos may have discussed attacks against Mexicali municipal police facilities and Federal Attorney General’s Office (FGR) installations. However, the DEA has not publicly confirmed the reported intercepted communication or said it was the reason for the alert.

The security warning follows a broader campaign against Los Rusos. Mexican authorities have carried out numerous operations against the group this year, including arrests, weapons seizures and raids on suspected logistics facilities. Recent operations have also uncovered clandestine aircraft, narcotics and weapons infrastructure, underscoring the scale of the organization’s alleged trafficking network in the Mexicali region.

The U.S. State Department currently classifies Baja California as Level 3 - “Reconsider Travel”, citing terrorism, crime and kidnapping risks. It says criminal groups compete for control of border areas and trafficking routes used for narcotics and human smuggling.

With more than one million residents, Mexicali is one of Mexico’s largest border cities and sits directly across from Calexico, California. Its extensive commercial and social links with the United States make any security disruption significant for both countries.

For now, Mexican authorities maintain that there is no confirmed imminent threat to the public, while U.S. officials continue to treat the intelligence seriously enough to impose temporary restrictions. The episode highlights the growing U.S.-Mexico security partnership against cartel networks, as well as the potential for heightened tensions following increasingly aggressive operations against organized crime.