The head of Islamic State group (ISIL) in Afghanistan, Abu Sayed, was killed in an attack on his headquarters in Kunar province earlier this week, the Pentagon said on Friday.
"The raid also killed other ISIS-K members and will significantly disrupt the terror group's plans to expand its presence in Afghanistan".
National Security Correspondent Jeff Seldin at the Pentagon contributed to this article. Hasib's predecessor Hafiz Saeed Khan died in a United States drone strike in 2016.
IS has faced armed opposition from the larger and more powerful Afghan Taliban and has struggled to increase its support or the amount of territory it holds in Afghanistan.More news: Illinois Teen Charged With First-Degree Murder for Death of Mother
Abu Sayed was chosen to lead the group after Afghan and U.S. forces killed former Daesh-K leaders Abdul Hasib and Hafiz Sayed Khan in April this year and July last year respectively.
Despite being under constant bombardment and hemorrhaging leadership, the Islamic State's offshoot in Afghanistan has managed to keep a foothold in the country.
IS announced it was moving into Afghanistan and Pakistan when it declared its so-called Khorasan Province (sometimes called ISIS-K) in 2015.
The US military had said Hasib's death would "help reach our goal of destroying them in 2017".