A man has been arrested following a ‘serious incident’ at Hainault Tube Station .
The station, which is at the end of the Central Line in Redbridge, can be seen surrounded by emergency services, including a police helicopter.
Reports on social media suggest a number of people were attacked with a large knife outside Jet Petrol station around 7.45am.
A video appears to show a man walking near the station with a long blade.