A teenager is fighting for his life in hospital after being stabbed in the chest on a north London bus.
Scotland Yard was called to reports of a stabbing on board a 134 bus in North Finchley at around 4.40pm on Saturday.
Police and paramedics scrambled to Colney Hatch Lane and found a 19-year-old who had suffered a stab wound to the chest.
The teenager was airlifted to an east London hospital where he remains in critical condition, a police spokesman said.
"At this early stage there have been no arrests," he added.
The stabbing comes during a surge in knife crime in London.
A spate of fatal stabbings in the capital – five in the past week - has prompted warnings from a police chief that the country is facing a national emergency.
After a drop in knife crime for several years, marked by a low in 2014, figures from the Home Office show knife crime is on the rise in the UK, with the number of knife related offences in 2018 the highest since 2011.
Recent figures show the number of young people killed by knives rose by nearly 50 per cent last year amid a surge of violence.
In 2018, 76 people were reportedly stabbed to death in London and 306 in the UK as a whole. Of those, 23 were children.
At PMQs on Wednesday, Theresa May announced she would host a summit on knife crime and said the Government would be putting more resources into policing.
Anyone with information is asked to call Barnet CID on 101 quoting reference 5259/9MAR, Tweet @MetCC or call Crimestoppers anonymously on 0800 555 111.
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