According to CNN, a sniper who was outside the airport opened fire on the guards.
A shootout involving the military of Western countries took place at the Kabul airport on Monday, during which Afghan guards opened fire on unidentified armed people, representatives of the German armed forces said.
Thousands of Afghans and foreign citizens have been crowding at the airport for several days, who want to leave the country after Taliban militants entered Kabul on August 15.
As a result of shootings and stampedes at the airport, at least twenty people were killed. According to the German military, one person was killed as a result of a shootout on Monday.
According to CNN, a sniper outside the airport fired at Afghan security guards who are helping the U.S. military ensure security at the airport.
It is reported that American and German servicemen participated in the clash. Three wounded Afghans are being treated at a field hospital at the airport.
Two NATO representatives at the airport said that after the shooting, the situation was brought under control.
The Taliban has stationed its fighters outside the airport to help enforce the order.