US forces launched a drone strike in Kabul on Sunday that killed a suicide car bomber suspected of preparing to attack the airport, United States officials said, as the country nears the end of its military presence in the city.
The strike, first reported by Reuters, is the second carried out by US forces in Afghanistan since an Islamic State suicide bomber struck the airport on Thursday, killing 13 United States troops and scores of Afghan civilians trying to flee the country.
One US official said Sunday's strike was carried out by an unmanned aircraft and secondary explosions following the strike showed the vehicle had been carrying a "substantial amount of explosive material".
Witnesses reported a large blast shaking a neighborhood north of Hamid Karzai International Airport, and television footage showed black smoke rising into the sky.
US Central Command confirmed the strike and said in a statement it had no immediate indication it caused any civilian casualties, but was investigating.
"We remain vigilant for potential future threats," it said.
US President Joe Biden had warned on Saturday the situation on the ground in Kabul remained extremely dangerous and that his military chiefs had told him another militant attack was highly likely within the next 24-36 hours. US officials had said they were particularly concerned about the local affiliate of the Islamic State (ISIS-K) attacking the airport as United States troops depart, in particular the threat from rockets and vehicle-borne explosives.
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Sunday's drone strike took place as Biden headed to Dover Air Force Base in Delaware to honour the US service members killed in Thursday's suicide bombing.
On Friday the US military launched a drone strike that it said targeted ISIS-K militants in Nangarhar Province, east of Kabul, killing two of the group's planners and wounding a third.
As the US continues to withdraw troops, officials say concerns about another Islamic State attack will mount.
Biden sent thousands of troops to Kabul airport as the Taliban swept across Afghanistan earlier this month to help evacuate US citizens, at-risk Afghans and other foreigners who wanted to escape the country's new rulers.
At the peak of the deployment, there were 5800 US troops securing the airport, where the unprecedented airlift operation is set to end by Tuesday.
Despite Biden's vow to go after the perpetrators of Thursday's attack, US officials have cautioned that beyond a symbolic act or limited operation, the United States could in fact do little to degrade ISIS-K.
