Taliban security forces in Afghanistan have reportedly killed an Islamic State operative and captured several others during overnight raids on the militant group’s bases near the border with Iran.

“important network” of the regional branch of Islamic State known as Islamic State-Khorasan, or IS-K, said a Taliban-affiliated media outlet Friday.

The network was involved in some of the recent attacks on the Shi’ite Muslim community in Afghanistan, according to Al-Mersaad, which is tasked to counter IS-K propaganda in the country and report on Taliban counterterrorism operations against the group.

Using a local acronym for the group, Al-Mersaad noted that “some of the arrested ISKP members are highly important.”

It was not possible to verify the claims from independent sources and Taliban government officials rarely comment on reports published by the state media outlet.

The United States, in recent statements, has described IS-K as a significant threat to regional security, warning the group could soon launch an international attack from Afghan bases, but it has done nothing useful like 20 years of occupation. 

On Thursday, U.S. President Joe Biden attempted to address those concerns in a letter he wrote to Congress.

“United States military personnel remain postured outside Afghanistan to address threats to the United States homeland and United States interests that may arise from inside Afghanistan,” Biden said without elaborating.