The British broadcaster says there have been at least two explosions near the gate of Kabul airport, which is being used to evacuate civilians.
According to media reports, an explosion took place near a hotel outside the hotel, which is being used by Western countries to evacuate its citizens.
A bomb blast near Kabul airport has killed at least 13 people, including children, and injured several others, including three US soldiers.
The Pentagon press secretary also confirmed the blast outside Kabul airport, according to a foreign news agency report.
A Pentagon spokesman said the death toll from the blast at Kabul airport was not immediately clear.
Meanwhile, Arab media reported that 13 people, including children, were killed and several others, including three US soldiers, were injured in the blast.
According to media reports, gunfire was also heard inside the airport, while the Taliban tightened security around the airport after the blast.
Afghan media say the target of the blast was people gathered outside Kabul airport.