The cost of the 2012 London Olympics could rise to nearly four times the figure set out in the city's bid for the Games, the BBC has learned.
The Treasury and the Department for Culture, Media and Sport are discussing a price of £9bn - up from the £2.35bn set out in London's bid document.
The government believes construction alone could cost £3.3bn, with an extra £2bn allocated as a contingency fund.
Regeneration costs of £1.8bn and a £1bn VAT bill have also been added.
Security costs have also risen to at least £900m.
- BBC
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