BLOODTHIRSTY ISIS terrorists have reportedly beheaded 11 Christian hostages on Christmas Day in Nigeria.

The militants said in a sickening video that the mass killing was in revenge for the deaths “of our leaders, including Abu Bakr al-Baghdadi”.

3 Members of ISIS group Boko Haram in Nigeria Credit: Handout - Getty

3 The late terror chief al-Baghdadi, who was killed by US forces in October 2019 Credit: AFP or licensors

Islamic State West Africa Province (ISWAP), which includes supporters from Boko Haram, released a shocking 56-second video.

Claiming to show their captives’ execution, the clip was produced by ISIS's media arm, Amaq, reports the BBC.

UN Secretary-General António Guterres said he was deeply concerned about reports that civilians have been executed, and others abducted, by an armed group in northern Borno State, northeastern Nigeria.

Conflict journalist Ahmad Salkida, who monitors terrorist activities in Nigeria’s northeast, wrote: “The decision to execute the captives was rather swift, abrupt and shocking.

“ISWAP had reportedly opened a window of negotiations… to exchange the freedom of the captives with those of its members in government custody.

“But the Nigerian government failed to take the offer.”

BAGHDADI REVENGE

Salkida said ISWAP’s media spokesperson defended the Christmas Day executions, saying: “We killed them as a revenge for the killings of our leaders, including Abu Bakr al-Baghdadi and Abul-Hasan Al-Muhajir in Iraq and Syria.”

Baghdadi died in a US raid on a compound near the village of Barisha on October 26.

The BBC reports that the 11 Christians were all male, and the video was released on December 26.

It said that "one captive in the middle is shot dead, while the other 10 are pushed to the ground and beheaded."

The Guardian Nigeria reports that the mass deaths occurred hours after Boko Haram militants slaughtered seven people on December 24, during a raid on a Christian village near the town of Chibok.

The UN Secretary-General expressed his "deepest condolences to the families of the victims and reiterates the solidarity of the United Nations with the people and Government of Nigeria."

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He added: "Attacks by a party to an armed conflict that target civilians, aid workers, and civilian infrastructure violate international humanitarian law.

"Those responsible for these atrocities must be held accountable.

"International human rights law and international humanitarian law must be fully respected, and all civilians in Nigeria must be protected."