A teenager was stabbed during a fight in broad daylight filmed near a busy city centre.
Horrifying footage shows the clash in the centre of Wakefield, West Yorkshire.
Moments before the attack teenagers had been seen kicking each other, pulling each others hair, and a window had been smashed.
Police said a seriously injured man was found after they were called to Lower York Street at 6.30pm on Monday.
Three people have been arrested including a 17-year-old girl and a 19-year-old man.