A nine-year-old boy is in hospital after being stabbed at a skate park in West Yorkshire.
It happened at around 4:40pm this afternoon at the Carnegie Stake Park in Shipley.
The boy was injured on his chest and arm. He was taken to Leeds General Infirmary by air ambulance, where his condition is described as stable.
The suspect is described as white, in his twenties, wearing a cap and glasses. He is also believed to have a walking stick.
The attack is being treated as a critical incident and numerous police resources are at the scene.
Any witnesses or anyone with information is asked to contact the non emergency number 101 or Crimestoppers in confidence on 0800 555 11.