A firefight at one of the gates of Kabul’s international airport killed at least one Afghan soldier early Monday, German officials said, the latest chaos to engulf Western efforts to evacuate those fleeing the Taliban takeover of the country.

The shooting near the military side of the airport came as the Taliban sent fighters to the north of the capital to eliminate pockets of armed resistance to their lightning takeover earlier this month. The Taliban said they retook three districts that fell the day before and had surrounded Panjshir, the last province that remains out of their control.

Afghanistan’s security forces collapsed in the face of the Taliban advance, despite 20 years of Western aid, training and assistance. But some armed Afghans remain at Kabul airport assisting Western evacuation efforts.

The gunfire broke out near the airport’s northern gate, where at least seven Afghans died a day earlier in a panicked stampede of thousands of people trying to flee the country. The circumstances of the shooting, which occurred around dawn, remained unclear.

The German military tweeted that one member of the Afghan security forces was killed and three others were wounded by “unknown attackers.” It later clarified that it was referring to “members of the Afghan army” involved in securing the airport.

The U.S. military and NATO did not immediately acknowledge the shooting. There was no comment from the Taliban.

The tragic scenes around the airport have transfixed the world. Afghans poured onto the tarmac last week and some clung to a U.S. military transport plane as it took off, later plunging to their deaths. At least seven people died that day, in addition to the seven killed Sunday.

The Taliban blame the chaotic evacuation on the U.S. military, saying there’s no need for Afghans to fear them, even though their fighters shoot into the air and beat people with batons as they try to control the crowds outside the airport perimeter.

The Taliban have pledged amnesty to those who worked with the U.S., NATO and the toppled Afghan government, but many Afghans still fear revenge attacks. There have been reports in recent days of the Taliban hunting down their former enemies. It’s unclear if Taliban leaders are saying one thing and doing another, or if fighters are taking matters into their own hands.