Islamic State (ISIS) terrorists in Syria appear to have started a new trend when they released video on Tuesday of themselves burning a Jordanian pilot to death; officials in Cameroon reported on Thursday that Boko Haram Islamist terrorists have shot and burned to death at least 91 civilians.

The slaughter occurred during two days of fighting in a town near the Nigerian border named Fotokol, and aside from the murdered another 500 were reportedly wounded, reports The Associated Press.

Around 800 jihadists of the terror group that has been waging a five-year Islamist insurgency in Nigeria crossed the border to take part in the massacre, in which they "burned churches, mosques and villages and slaughtered youth who resisted joining them to fight Cameroonian forces," Information Minister Issa Tchiroma Bakari told the news agency.

He added that livestock and food were also raided during the fighting, noting that the violence broke out on Wednesday and has been blazing on into Thursday. Schools have also been burned down by the terrorists, whose name Boko Haram means "Western education is forbidden."

Cameroon's military spokesperson Col. Didier Badjeck revealed that even though reinforcements have reached the town, the combat is still bogged down due to the fact that the terrorists are using civilians as human shields.

Nevertheless, the country's Defense Minister Edgard Alain Mebe Ngo reported that hundreds of the terrorists died in the fighting Wednesday, whereas only 13 Chadian and six Cameroonian soldiers fell.

The minister added that it remains impossible to bring most of the over 500 wounded to hospital due to the ongoing fighting.

In confronting the spread of Boko Haram, the African Union has been working on plans for a multinational force on the continent. Those plans have yet to be sealed however as funding is a major question, with the Union asking for UN backing.

Boko Haram has been steadily stepping up its killing spree, murdering around 10,000 people last year as compared to 2,000 in the first four years of their insurgency in Nigeria, reports the Council on Foreign Relations.