The school in Leeds where a teacher died after being stabbed yesterday has opened as normal this morning.
Flowers have been laid along the road outside the school in memory of Ann Maguire, who taught Spanish and RE there.
A 15-year-old is being questioned by police.
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The arrests were made in connection with Operation Stovewood
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Janet Senior and Josie Howarth, who run a donkey sanctuary in Knottingley, were just 15 feet away when Salman Abedi detonated the bomb.