Police on Tuesday night arrested a 16-year-old youth for assault after he burst into a classroom at Haramachi Public High School in Minami-Soma, Fukushima Prefecture, on Tuesday morning and injured six students.

According to police, the youth who was a student at the same school, was wearing sunglasses, a face mask and knit cap, when he burst into the first floor classroom just after 8 a.m., Fuji TV reported. A teacher who tried to stop him said he was swinging a hard object wrapped in a vinyl bag. Six students were injured. Two girls were taken to hospital for treatment, police said.

Police took the youth into custody just after 10 p.m. Tuesday. He has so far given no motive for the attack, local media reported.

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