The United States said on Monday it was offering a reward of up to $10 million each for information leading to the identification or location of ISIS-K leader Sanaullah Ghafari and for information leading to the arrest of those responsible for a deadly August 2021 attack at Kabul airport.

The Islamic State-Khorasan Province, or ISIS-K, is the regional Islamic State affiliate that first appeared in 2014 and was named after an old term for the region. It has fought both the Taliban and the Western-backed government that fell in August.

In June 2020, Ghafari was appointed by the extremist group to lead ISIS-K. Ghafari was responsible for approving all ISIS-K operations throughout Afghanistan and arranging funding to conduct operations, the U.S. State Department said.

In November, the U.S. State Department designated Ghafari as a "specially designated global terrorist."

The U.S. military said on Friday that a single Islamic State bomber killed 13 U.S. troops and at least 170 Afghans at Kabul airport last August.

The bombing occurred on August 26 as U.S. troops were trying to help Americans and Afghans flee in the chaotic aftermath of the Taliban's takeover, and it compounded America's sense of defeat after 20 years of war.

It also left President Joe Biden's administration struggling to answer accusations that the State Department could have evacuated Americans sooner instead of putting U.S. troops at risk.

U.S. officials said in November they believed ISIS-K could develop the ability to strike outside of Afghanistan within six to 12 months.(Text, excluding headline: Reuters)

•PHOTO:Fellow Marines who served in Bahrain with Marine Corps Sgt. Johanny Rosario Pichardo, who was among 13 U.S. service members killed in the airport suicide bombing in Afghanistan’s capital Kabul, pay their respects in her hometown in Lawrence, Massachusetts on Sept. 14, 2021.