One of the gates to the Kabul airport was hit by a large explosion hours after US and UK intelligence agencies warned of an imminent terrorist threat from the Islamic State (IS) terrorist group.
According to the Taliban, at least 13 people died, including several children, a figure that will increase over time, according to experts.
According to the first information, a suicide bomber detonated in the middle of the line of thousands of people waiting to enter the airport and take one of the evacuation flights of the western powers.
Among the wounded are American soldiers, assisting in the running of the Kabul airport, and British citizens, Reuters and The Guardian confirmed.
US President Joe Biden has already been informed of what happened, the White House said. The US embassy in Kabul ordered its citizens to leave the area, following the reports.
Two other explosions were reported at the Baron Hotel, where Afghan diplomats and refugees were to be evacuated by the United Kingdom.