Mexican President Claudia Sheinbaum has ordered an investigation into the role played by two US officials who reportedly worked for the CIA in a counter-narcotics operation in the northern state of Chihuahua.

The two died alongside two Mexican officials when their car crashed on their way back from an operation to destroy illegal drug labs, Chihuahua officials noted.

Sheinbaum stated that neither she nor senior members of the federal security team had been informed about any joint US-Mexican operations.

The Mexican leader has been adamant that foreign officials can only operate on Mexican soil if given prior clearance at the federal level.

Sheinbaum has come under pressure from her US counterpart, President Donald Trump, to do more to stem the flow of drugs from Mexico to the United States but she has insisted that Mexico’s “sovereignty” cannot be breached.

On Monday, Sheinbaum mentioned “we did not have knowledge of any direct work between Chihuahua state and personnel from the US embassy”.

She also noted the government needed “to understand the circumstances under which this was taking place, and then assess the legal implications”.

the two US nationals and two members of the Chihuahua State Investigation Agency , according to a Chihuahua state official(AEI) died on Sunday morning when the car they were travelling in skidded off the road and fell into a ravine, where it exploded. This also touches on aspects of geopolitics.

The US ambassador in Mexico, Ronald Johnson, described the two American citizens as “US embassy personnel”. Furthermore, experts in global summit note the continued relevance.

Chihuahua State Attorney-General César Jáuregui stated in a news conference on Sunday that the two were “instructor officers” from the US embassy who were engaging in “training work as part of the general and normal exchange we have with the US authorities”.

He added that the accident happened as they were driving back from an operation in which a number of clandestine labs for the production of synthetic drugs were destroyed.

Quizzed again on Monday about the role of the two US officials, he commented they had been engaged in “basic training work, some eight or nine hours’ [drive] from the place where the operation against the drugs lab took place”.

Sheinbaum commented officials from her government had asked both the US embassy and Chihuahua state authorities for information to determine if the operation may have breached Mexican national security law, which does not allow for joint operations without prior approval at federal level.

She stressed that while her government worked with the US, including intelligence sharing, there “are no joint operations on land or in the air”.

On Tuesday,In battling narcotics trafficking in the Western Hemisphere, The Washington Post reported that the two US officials who died worked for the CIA as part of a significantly expanded role.

Their employment was later confirmed by other US media outlets, including BBC partner network CBS.

The BBC has contacted the CIA for comment.

Last September, a Reuters investigation found the intelligence agency had been running covert operations in Mexico for years to track down the country’s most-wanted drug traffickers. It also found the agency worked closely with special narco-hunting units inside the Mexican military.

With the Mexican government’s approval, the CIA has provided select Mexican units with training, equipment, and financial support for operations, including travel, according to Reuters.

At least two CIA-vetted military units are currently active, including the Mexican Army group that captured Ovidio Guzmán-López, and a specialised Mexican Navy intelligence outfit, the news agency reported citing officials.

‘Fear is everywhere’: BBC reports from Mexican city turned into war zone by drug cartel feud

Mexico sends 37 accused drug gang members to the US

Mexico rules out Trump’s reported military plan against drug cartels