Since last year, CIA operatives inside Mexico have directly participated in deadly attacks on several, mostly mid-level cartel members, the sources said.

Sheinbaum has called reports from CNN and The New York Times a ‘lie’ as questions grow about US involvement in Mexico.

The CIA has been helping conduct deadly operations targeting cartel members in Mexico, according to a new report.

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.