An explosion has happened outside Kabul airport where thousands of people are crowded together in an effort to flee, the US Pentagon says.
It is unclear whether there have been any casualties so far, officials say.
Thousands of Afghans have been gathered at the airport for days trying to escape from the country since the Taliban takeover earlier this month. Western nations had warned of a possible attack.
US Pentagon spokesman John Kirby confirmed there had been an explosion.
The White House said Joe Biden had been briefed on the explosion.
More follows...
