Two people have serious leg injuries after the bus crash in Kennington, the London Ambulance Service said.
Press Association reporter James Edgar tweeted:
London ambulance service say 2 serious leg injuries. 1 adult male, 1 adult female.
One taken to Kings, one to George's. Both by road supported by air ambulance
"The scene is now clear of all patients; they have all been taken to hospital," a London Ambulance spokesman said.
Two people who were trapped on the crashed bus in south London have now been removed, Press Association reporter James Edgar said.
Crews removing debris from top deck. One person still on bus
Last person removed from back of bus
Scotland Yard said two passengers still remain trapped on the bus and two uniformed police officers who were travelling on the bus, are among the 30 injured.
London Ambulance Service say 6 people are seriously injured.
The tree was embedded in the front of the bus and emergency crews were using cutting equipment to gain access to one side of the vehicle.
24 people with minor injuries have been taken to St Thomas' hospital, a London Ambulance Service spokesperson has said.
Several others in a more serious condition are being treated at the scene of the crash.
Two people, including a 19-year-old girl, are in critical condition after a bus crashed into a tree in Kennington, a police sergeant at the scene has confirmed.
We're now treating more than a dozen patients at the #Kennington bus crash. More details to follow
– Mike Weston, TfL's Director for Buses
At around 10:50 today a route 59 double deck bus, operated by Arriva, swerved to avoid another vehicle and struck a tree. The incident took place on Kennington Road near the Imperial War Museum SE1. Our first concern is, of course, for the driver, passengers and others involved in this incident and we can confirm the emergency services are in attendance. There will be a thorough investigation into this incident as a matter of urgency
Police, ambulance and fire crews are on the scene of a bus crash in Kennington Road in which a number of people have been injured, a police sergeant at the scene has confirmed.
Emergency crews were using a cherry picker to gain access to the back of the bus.
When asked how many people had been hurt, a police sergeant said "a lot". It is not known if anyone has died.
The front of the bus - a number 59 heading to King's Cross - was crumpled against a tree near the Ship pub on Kennington Road.
Fire crews used ladders to remove people and seats from the top of the back of the bus. One onlooker said the driver was trapped inside.