The United States changed its security measures in Nogales, limiting official activities and travel in the border city in Mexico’s northern state of Sonora to essential movements during daylight hours.
The U.S. mission in Mexico asked U.S. citizens to pay closer attention to their surroundings as part of a precautionary measure taken in response to information about an unspecified threat.
The mission’s warning urged people to seek shelter in a safe place if they encounter any incident and to follow the instructions of Mexican law enforcement.
Sonora under a Level 3 travel advisory
Sonora is listed at Level 3 in the U.S. travel advisory system. This classification advises travelers to reconsider any plans to visit the region.
The U.S. state of Arizona lies north of Sonora, while New Mexico is located to the northeast. Nogales in Sonora is described as a busy border crossing associated with organized crime, smuggling and periodic incidents of violence.