Three Mexican police officers have been killed at Mexico City International Airport during a shootout with two other officers.
It is believed the three dead officers were attempting to arrest the two officers, who are accused of being involved with a cocaine trafficking business.
Passengers at the airport, which is located in Venustiano Carranza in the outskirts of the city, were forced to duck for cover as the suspected drug traffickers opened fire.
Two arresting officers were killed immediately. A third was injured during the shooting and later died in hospital.
The two suspects escaped and remain on the run from authorities.
Flights at the airport are operating normally, despite an ongoing investigation at the crime scene.
“When the alleged perpetrators were surrounded by the police, shots were fired against the federal agents,” a security ministry statement said.
Up to 200 kilograms of cocaine has been seized at the airport so far this year.