Dyfed-Powys Police said an arrest was made at an address in Ammanford, Carmarthenshire, just hours after two teachers and a student were stabbed in the same area (pictured).
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A teacher named locally as Liz Hopkin was allegedly stabbed by a teenage girl at Amman Valley School, in Carmarthenshire, during a knife rampage with an insider claiming she is "lucky to be alive"