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Zabihullah Mujahid, who holds the office of Information Minister in the Taliban-installed government in Afghanistan, told the Russian media that his organization was the source of the information. The threat was not specific, he said in an interview, but the plan was to provoke chaos and violence at the airport and hurt the Taliban's reputation.

"Over the last 20 years we have learned things and changed," the official said in the interview. "We want to prove that we are not what anti-Taliban propaganda has portrayed us to be. We want to show that to the world."

"When the explosion happened, we fell from the wall on the footpath. There were lots of people [there] so we fell on them. And when we fell on them, the effect of that explosion just came to us," he said. "Our eyes were full of tears. And also we couldn't breathe, like there was no oxygen for 30 or 40 seconds."

The powerful blast was unlike anything Ahmadzai had witnessed in the more than 20 years that his family lived in Kabul, he said. People panicked, both the Afghans outside and the guards inside. The Americans "started shooting," he said, adding that he believed some people in the crowd got shot by the US troops in those initial moments of confusion.

As terrified people fled for their lives, a stampede started, and Ahmadzai got separated from his aunt's family, he said. He fell on the ground when his foot got stuck in something, but luckily his shoe came off and he managed to get to the wall again and climb up. Then he finally managed to circle back and find his relatives, who he feared could have been trampled to death by the crowd.