Authorities in northern Mexico said the Americans were not involved in the raid. In an earlier statement, authorities suggested they were part of the raid.

Two employees of the U.S. Embassy in Mexico and two Mexican law enforcement officers were killed in a car crash over the weekend in Chihuahua.

Mexican President Claudia Sheinbaum said she requested details about a security operation in Chihuahua involving U.S. agents, two of whom were killed.