London's police are experienced in terror alerts
The head of London's 2012 Olympics has vowed the event will be "secure" following the terror attacks in Mumbai.
Lord Coe moved to reassure the public that security "underpinned" planning for the Games.
He said London's plans had the advantage of a police force with a long-established history of dealing with terror attacks.
However Lord Coe would not be drawn into releasing information about the 2012 security plan.
"Our security plans are under way and we will deliver a secure Games," he told a press conference in London for the International Olympic Committee's debriefing of the Beijing 2008 Games.
He said security was paramount, and as such no information would be released: "Those are budgets and scopes that are still being detailed.
"You will not be surprised that we will not go into detail about that, but like every city we will take that (security) very seriously."