Mexico warns US involvement in anti-drug operation should not be repeated

Claudia Sheinbaum says Mexico was not aware of US participation until four officials were killed in car crash Claudia Sheinbaum , Mexico’s president, said on Monday that her government told the United States, in a diplomatic note, that the unauthorized presence of US officials at an anti-narcotics operation in the northern state of Chihuahua should not be repeated. The incident came to light after two US officials, along with two Mexican officials, were killed in a car crash on 19 April after th