MEXICO CITY, April 23 -- Mexico's government and the White House sparred Wednesday over the death of two Americans in connection to an anti-drug raid, after US media reported the officials were CIA personnel.

The two Americans died in a car accident on Sunday in the northern state of Chihuahua. Two Mexican investigators also died in the crash.

CBS network and other US media have reported that the two Americans, who have not been identified, worked for the Central Intelligence Agency. The US ambassador in Mexico on Sunday said only they were US embassy employees who died in a car accident.

On Wednesday, President Claudia Sheinbaum said that the federal government was investigating whether they had been operating in an internal security ...