A forensics officer at the scene at the Islington McDonalds today
Police were called to the fast-food diner at around 1.15am early this morning.
The victim was treated by paramedics at the scene before being taken to a north London hospital.
The 28-year-old is now believe to be in a stable condition.
The McDonalds branch, at the junction of York Way and Pentonville Road, remains sealed off today.
Police forensics teams in white suits are now sweeping the building for clues, with photos showing bloody tissues by the McDonalds entrance.
Blood can also be seen splattered across the pavement outside the diner, where the victim was initially treated by paramedics.
Blood on the pavement outside the McDonalds crime scene in Islington
Police are now hunting the suspect, who had a afro haircut and “wispy” moustache.
They described him as a white, or light-skinned black, male.
Police are currently hunting for a suspect after the McDonalds attack
He was wearing thick-glasses, a blue jacket over a black top with light denim jeans and grey trainers.
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Anyone with information can call Islington police on 0208 345 0296, the police non-emergency line on 101 or Crimestoppers anonymously on 0800 555 111.