MPs raise concerns over Olympic security costs
9 March 2012 Last updated at 21:35 GMT
MPs have raised concerns the London 2012 Olympics may go over budget and said it was "staggering" initial estimates about security costs were so wrong.
The Public Accounts Committee's report also warned the stadium must not become a 'white elephant'.
The government insists it is confident the event will come in under budget.
Ben Ando reports.