THREATENING messages were allegedly sent between two boys before a 15-year-old died in a stabbing attack.
The victim, named in reports as Harvey Willgoose, was stabbed at All Saints Catholic High School in Granville Road, Sheffield, at about 12.17pm on Monday.
Horrified pupils watched on when he was knifed three times in a school courtyard.
Teachers raced to give emergency first aid as the school was put in
lockdown and an air ambulance flew in.
The lad was taken to hospital but he died soon after arrival.
A 15-year-old pupil was detained by police and taken into custody.
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He was last night being quizzed on suspicion of murder.
The stabbing happened at 12.17pm as pupils moved between classes at All Saints Catholic High School in Sheffield.
It was claimed the pair had exchanged threatening messages before the incident.
And it came after the school went into lockdown last Wednesday
after a pupil was alleged to have taken a blade in.
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One furious parent said: "How can the school have allowed this to happen today?"
Sheffield Heeley Labour MP Louise Haigh said: "Serious questions will have to be answered."
A fellow pupil paid tribute to the killed teenager.
The 17-year-old said: "He was such a lovely lad, he was cheeky, but was lovely.
"He would make your day better hearing him down that hallway. Teachers loved him, students loved him, everyone loved him."
A neighbour of the victim, standing beside a shrine of flowers and
candles outside his family home, said: "He went to school this morning and has not come home.
"He always seemed to have a smile on his face. So sad."
Another neighbour said: "He and his dad were huge Sheffield United
fans. It is just too awful for words."
South Yorkshire Police's Assistant Chief Constable Lindsey Butterfield
said: "We know that what has happened will cause significant distress
and concern.
"Our officers will remain on scene and in the local area to offer reassurance to parents, staff and local residents as our
investigation continues."
South Yorkshire mayor Oliver Coppard said: "This morning a
teenage boy went to school like thousands of others across South Yorkshire but won't come home.
"A young man who was a member of our community, with his
whole life ahead of him.
"My love, my thoughts and my prayers are with his family and friends, and the whole community of All Saints Catholic High School."
PM Sir Keir Starmer said: "My heart goes out to the family and
loved ones of the boy, the staff and students at the school, and the
entire community of Sheffield.
"They are grieving the needless loss of a young life and the nation mourns with them.
"Our schools should be places of safety and learning, not violence and fear.
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"Tonight a young boy should be returning to the love and safety of
his family.
"We stand and work together against the devastating consequences of knife crime, so no more families know this tragic loss."