A 56-year-old woman is in a critical condition after being hit by a bus in Stoke Newington on Saturday.
Police were called at around 4:30pm to Stoke Newington Road at the junction of Princess May Road.
London Ambulance Service took the pedestrian to an East London hospital.
Inquiries continue and there were no arrests.
The bus was a rail replacement service travelling towards Tottenham.
Police are appealing for anyone with information to call the Collision Investigation Unit at Chadwell Heath Traffic Garage on 0208 597 4874 or the Police non-emergency line 101.