As many as 2,000 people are feared dead in Nigeria from what has been described as Boko Haram’s deadliest attack amid ongoing bloodshed a UN official says “should be searing the conscience of the world.”

The militant group reportedly carried out attacks starting January 3 on the northern town of Baga and neighboring villages, razing more than a dozen communities and forcing residents to flee for their lives.

Musa Bukar, head of the Kukawa local government area, stated that Boko Haram “burnt to the ground all the 16 towns and villages, including Baga, Doron-Baga, Mile 4, Mile 3, Kauyen Kuros and Bunduram.”

Observers have said that giving an exact death toll is near impossible, though an estimate of 2,000 was “credible.”

A week after the bloodshed, the scene is still grim. CNN reports Monday that “bodies still littered the bushes in the area.”

Borye Kime, a fisherman from Dubuwa village who had fled to Chad, told AFP Monday: “It is corpses everywhere. The whole town smells of decomposing bodies.” He added that Boko Haram had “set up barricades in strategic locations in the town.”

Some of those who attempted to flee eastward drowned in Lake Chad in their attempts to seek refuge; others remain stranded on an island facing lack of shelter, the threat of hippos and malaria. Over 7,000 others have fled to Chad since the beginning of the month, part of an exodus of tens of thousands as a result of the conflict, the UN refugee agency says.

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