Head of the US Central Command General Frank McKenzie, has apologised for a drone strike in Kabul last month at Hamid Karzai Airport that killed as many as 10 civilians, including seven children.

“Our investigation now concludes that the strike was a tragic mistake,” McKenzie told reporters. Earlier, while defending the attack, the US had said that the strike was targeting a suicide bomber of the militant Islamic State group and had described it as “righteous”, reports Al Jazeera.

The US general offered his condolences to the families of the victims and stated that those who were killed had no connection with local Islamic State affiliates or posed any direct threat to US forces.

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Defence Secretary Lloyd Austin said the drone strike had killed a civilian, Mr Ahmadi, who worked for a non-profit called Nutrition and Education International.

“They were innocent, helpless children,” Aimal Ahmadi, whose nieces and nephews were killed in the attack, told Al-Jazeera.

Ahmad Naser who was among the victims had been a translator for the US forces. The youngest child, Sumaya, was just two years old, as per BBC.

Zabihullah Mujahid, the spokesman for the Afghan Taliban, confirmed at the time that the strike had killed seven people.