Emergency workers and security forces at the site of a suicide-bomb attack at the outskirts of Maiduguri, Nigeria, on Feb. 17, 2017. (Jossy Ola/AP Images)

A teen suicide bomber targeted worshippers at a mosque in Nigeria, killing at least 50 people, authorities reported on Tuesday. The teen boy detonated his explosives in the crowd that had gathered around 5:20 a.m. for morning prayers in the northeastern town of Mubi.

Authorities say that they are “still trying to ascertain the number of injured because they are in various hospitals,” police spokesperson Othman Abubakar told the Associated Press.

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While no one has claimed responsibility for the bombing, the terrorist group Boko Haram, which has been held responsible for several similar attacks, is being eyed as a suspect in the case.

As AP notes, the sick and twisted extremist group has been using teenagers and young women—many of whom have been abducted—as bombers.

Read more at NBC News.