Police are on the scene of a major incident taking place in the London Bridge area.
The area both sides of London Bridge is being evacuated and it is believed there are also incidents at Borough Market and Vauxhall.
There have been reports of shots fired.
People are urged to avoid the area.
Police say armed officers responded to reports of a van hitting pedestrians on the bridge in central London.
The Metropolitan Police said armed officers were also at the nearby Borough Market.
It said “multiple resources” are in attendance.
All trains on the Greenwich Line through London Bridge have been held.
