BA wing clip passenger: 'We heard a real bang'
23 December 2013 Last updated at 18:23 GMT
A plane carrying more than 200 people has struck an office building while preparing to take off from the South African city of Johannesburg.
The British Airways flight to London was taxiing at OR Tambo International Airport when its right wing hit the building, injuring four people inside.
One passenger told the BBC that "we heard a real bang on the side of the aircraft".
Milton Nkosi reports from Johannesburg.