Police are appealing for information on a cyclist who knocked down a pedestrian in London before fleeing the scene.
The victim, a woman believed to be in her 50s, was crossing Kingsland High Street in Dalston, east London, shortly after 5pm on Tuesday when the bike ploughed into her.
Scotland Yard said the male cyclist initially stopped after falling off his bike, but quickly fled the scene.
Police, paramedics and London’s Air Ambulance were called at 5.07pm and took the critically-injured woman to hospital.
She remains in a life-threatening condition, the force said, as officers work to locate her next of kin.
The bicycle was later found abandoned in Approach Close in Stoke Newington, north-east London, but no arrests have been made.
Detective Constable Darren Case said: ‘This is a shocking incident as it appears the cyclist involved did not stop to assist the victim or contact the emergency services, instead making off.
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‘We need to hear from anyone who was in the area at the time. Did you see the cyclist before, during or after the collision? Maybe you are in possession of dash cam footage or filmed the cyclist on your mobile phone as he made off. If you did, it is vital that you make contact with us.
‘We are also appealing directly to the cyclist along with his friends and family who may know of his whereabouts – the pedestrian has suffered life-threatening injuries as a result of this collision and it is important that you do the right thing and make contact with police.’
Anyone with information is asked to contact the Serious Collisions Investigation Unit at Chadwell Heath on 020 8597 4874 or call 101 quoting CAD 5837/28 August.