Police are investigating after two teenagers were stabbed multiple times in a London park leaving a 15-year-old in a life threatening condition.
The boy, 15, was able to get to a hospital's A&E himself but with horrific injuries, it is reported.
Emergency services were reportedly called shortly after 8.30pm to West Harrow Park, in north west London.
Medics treated a 17-year-old boy, who had knife wounds, at the scene before he was taken to hospital.
An air ambulance helicopter was seen attending the scene and then heading off while the area was cordoned off.
Then the younger boy, 15, arrived at hospital with more serious stab wounds and is now in a critical condition.
A crime scene remains in place and no arrests have been made so far.
One person tweeted: "Any idea what has happened in West Harrow Park? Park roped off, helicopter has landed. Local roads closed."
It follows a series of stabbings this summer in London including an attack on two police officers and a social worker by a knifeman on Friday night.
Also in the early hours of Friday morning, a man, 23, was stabbed to death in Newham.
