17 January,2013 07:14 AM IST | | Agencies
Witnesses said the helicopter - which had requested to divert and land at London's Battersea Heliport due to bad weather conditions - hit a crane at the top of the tower near Vauxhall Bridge in Vauxhall, central London.u00a0
Pics/AFP
Eight fire engines, four fire rescue units and around 60 firefighters were at the scene to defuse the situation.
Eyewitness Matt Haverson, said, "It was extremely scary⦠I obviously thought it was a terrorist attack.
" Sarah-Beth Casey, who lives in a nearby flat, said, "You're always worried about things like 9/11 and things like that. I have three small children with me in the flat. It's one of your fears that something like this can happen. When I heard the explosion - it was like a little earthquake."u00a0