A 15-year-old boy has been airlifted to hospital after being stabbed inside a school in Cumbria this morning.
The incident happened at Walney School in Barrow at around 10.10am.
The teenage victim suffered 'multiple stab wounds', police said.
He was treated by NWAS at the scene and has now been taken to Alder Hey Hospital in an air ambulance.
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A 16-year-old boy was detained at around 10.40am near to Barrow train station.
He has been arrested on suspicion of grievous bodily harm with intent.
Cumbria Police said that officers remain at the scene.
"Police can reassure the public and parents that there is no perceived wider threat", a statement added.