CAIRO: Islamic State militants in Libya shot and beheaded groups of captive Ethiopian Christians, a video purportedly from the extremists showed Sunday. The attack widens the circle of nations affected by the group’s atrocities while showing its growth beyond a self-declared “caliphate” in Syria and Iraq.

The release of the 29-minute video comes a day after Afghanistan’s president blamed the extremists for a suicide attack in his country that killed at least 35 people — and underscores the chaos gripping Libya after its 2011 civil war and the killing of dictator Muammar Qaddafi.

It also mirrored a film released in February showing militants beheading 21 captured Egyptian Christians on a Libyan beach, which immediately drew Egyptian airstrikes on the group’s suspected positions in Libya. Whether Ethiopia would — or could — respond with similar military force remains unclear, as government officials offered no immediate comment on the video.

Ethiopia long has drawn the anger of Islamic extremists over its military’s attacks on neighboring Somalia, whose population is almost entirely Muslim. While the militant in the video at one point said “Muslim blood that was shed under the hands of your religion is not cheap,” it did not specifically mention the Ethiopian government’s actions.

The video starts with what it called a history of Christian-Muslim relations, followed by scenes of militants destroying churches, graves and icons. A masked fighter brandishing a pistol delivers a long statement, saying Christians must convert to Islam or pay a special tax prescribed by the Qur’an.

It shows one group of captives, identified as Ethiopian Christians, purportedly held by an Islamic State affiliate in eastern Libya known as Barqa Province. It also shows another purportedly held by an affiliate in the southern Libyan calling itself the Fazzan Province.

The video then switches between footage of the captives in the south being shot dead and the captives in the east being beheaded on a beach. It was not immediately possible to estimate how many captives were killed or confirm their identities.