President Claudia Sheinbaum sent a letter to Mexico's governors Friday reminding them that any security cooperation with foreign agencies must go through federal channels, a move that turns the deaths of two reported CIA officers in Chihuahua into a test of presidential authority,

Mexican President Claudia Sheinbaum said the government is still investigating a potential violation of national security laws in the incident.

Revelations about the presence of CIA agents at a drug raid are causing an uproar in Mexico

Mexican authorities continued to contradict themselves over the role of two CIA agents in a counternarcotics operation in northern Mexico and the extent to which Mexico’s federal government was aware of the U.

A deadly raid on a drug lab in northern Mexico has escalated into a diplomatic dispute after two CIA agents and two Mexican officers died in its aftermath. Conflicting accounts have emerged over whether the U.S. agents actively participated in the ...

According to sources familiar with the operation, the raid of a clandestine drug lab involved four CIA agents, raising questions about the scope of the agency's activity in Mexico.