Washington DC, August 27: US President Joe Biden on Thursday (local time) ordered that the flag of the United States shall be flown at half-staff at the White House and upon all public buildings and grounds, at all military posts and naval stations, and on all naval vessels of the federal government till August 30 to honour the victims of Kabul attack.

While honouring the victims of the attack in Kabul, Afghanistan, Biden said, "As a mark of respect for the US service members and other victims killed in the terrorist attack on August 26, 2021, in Kabul, Afghanistan, by the authority vested in me as President of the United States by the Constitution and the laws of the United States of America, I hereby order that the flag of the United States shall be flown at half-staff at the White House and upon all public buildings and grounds, at all military posts and naval stations, and on all naval vessels of the Federal Government in the District of Columbia and throughout the United States and its Territories and possessions until sunset, August 30, 2021."

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US President also directed that the flag shall be flown at half-staff for the same length of time at all United States embassies, legations, consular offices, and other facilities abroad, including all military facilities and naval vessels and stations. Kabul Attack: 'Talibs Denying Links with ISIS is Similar to Denial of Pak on Quetta Shura,' Says Afghan Acting President Amrullah Saleh.

"In witness whereof, I have hereunto set my hand this twenty-sixth day of August, in the year of our Lord two thousand twenty-one, and of the Independence of the United States of America the two hundred and forty-fifth," he added.

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Earlier, US President said the United States has reason to believe the leaders of the Islamic State-Khorasan terror group are behind the attacks at the Kabul airport.

Biden said the Islamic State-Khorasan has planned complex attacks against US forces and others in Afghanistan after they were released from prisons during the Taliban takeover of Afghanistan.

As many as 13 US troops were killed and 15 service members were injured including numerous Afghan civilians in twin bomb blasts outside Kabul airport on Thursday. The first blast was reported at the Abbey Gate in Kabul airport while the second one was near the Baron Hotel.

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