The Taliban have stepped up their search for people who worked for Nato forces or the previous Afghan government, a UN document has warned.
It said the militants have been going door-to-door to find targets and threatening their family members.
The hardline Islamist group has tried to reassure Afghans since seizing power, promising there would be “no revenge”.
But there are fears the Taliban have changed little since the brutal 1990s.
The warning the group was targeting “collaborators” came in a confidential document by the RHIPTO Norwegian Center for Global Analyses, which provides intelligence to the UN.
“There are a high number of individuals that are currently being targeted by the Taliban and the threat is crystal clear,” Christian Nellemann, who heads the group behind the report, told the BBC.
He warned that anyone on the Taliban’s blacklist was in severe danger and that there could be mass executions.
Foreign powers are continuing efforts to get their nationals out of Afghanistan. A Nato official said on Friday that more than 18,000 people have been evacuated in the last five days from Kabul airport.
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The aim is to double evacuation efforts over the weekend, the official said.
Outside the airport, the situation remains chaotic. The Taliban have been blocking Afghans trying to flee, with one video showing a child being handed to a US soldier.
In other developments:
More anti-Taliban protests have taken place in several cities. In the capital Kabul, demonstrators waved the national flag while there were reportedly casualties among protesters in AsadaOne of those who died falling from a US plane leaving Kabul has been identified as 19-year-old Zaki Anwari, who played for Afghanistan’s national youth football team