Police investigating a stabbing at a busy pub in Hornchurch, east London, have released an image of a man they want to speak to in connection with the incident.
The Met Police shared the image of the man as disturbing footage appearing to show the moments before a 23-year-old was stabbed was circulated online.
The incident was one of several stabbings in the capital at the weekend, with a man stabbed to death at the Star & Scorpion pub on Uxbridge Road, Ealing, just before midnight on Saturday.
The Met said officers were called to the pub in Hornchurch, Havering, named in reports as the Fatling Hornchurch, on the High Street, just after midnight on Saturday.
Watch: Man stabbed to death inside London pub
There they gave first aid to a man who had suffered "a number of stab wounds" as an ambulance rushed to the scene.
The victim was taken to an east London hospital where he remains in a serious, but stable condition. His next of kin have been informed, the Met said.
The force has released an image of a man they want to identify in connection with the incident.
Detective Sergeant Joe Seals, from the Met's local policing team in Havering, said: "We have been carrying out a number of urgent enquiries to track down the person responsible and we are now in a position to release an image of a man we need to identify.
"I would encourage anyone who recognises this man, or any witnesses who have not yet spoken to police, to contact us immediately."
Anyone with information about what happened is asked to call 101 quoting CAD 36/23Jul or Crimestoppers anonymously on 0800 555 111.