This CCTV footage from All Saints Roman Catholic School in Mansfield shows the scene after a teacher, who was suffering from depression, attacked a 14-year-old pupil with a dumbbell.
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A dry day with sunshine but cloud amounts increasing for the afternoon. Feeling warm in sunshine away from the Lincolnshire coast.
It will be feeling warm in the sunshine with mostly light winds, although it will turn breezier in the afternoon.
Detectives have launched an investigation after a schoolboy was hurt in a stabbing in Birmingham.