LONDON (AP) — Bloodied children ran screaming from a dance and yoga class “like a scene from a horror movie†to escape a teenager’s savage knife attack that killed two children and wounded 11 other people Monday in northwest England, police and witnesses said.

A 17-year-old boy was arrested on suspicion of murder and attempted murder in the stabbing in Southport, a seaside town near Liverpool, Merseyside Police said. The motive was not clear, but police said detectives were not treating the attack as terror-related.

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