President Rogge told members: “The IOC was appalled by the barbaric attack.”

“It has sadly proved there is no safe haven and that security must remain the priority whenever Olympics are staged.”

Thursday’s bomb attacks came less than 24 hours after London had won the vote to host the 2012 Games.

IOC communications director Giselle Davies said it was not thought the attacks had any link to the Games. “Security is one of the 17 themes of evaluating the Olympics and we have full confidence in the London authorities for a secure Olympic Games,” she said.

Craig Reedie, chairman of the British Olympic Association, said: “I can assure you that when we return to London these terrible acts will in no way reduce our resolve to run excellent Olympic Games in 2012.”

London 2012 bid chairman Sebastian Coe said: “The entire staff of the London 2012 team are shocked and deeply saddened by the tragic events in London.”

The attacks are not expected to affect high-profile UK sporting events from going ahead.

The one-day cricket internationals between England and Australia planned for London look likely to proceed, with the games at Lord’s on Sunday and the Oval on Tuesday both sell-outs.
The English cricket authorities will take security advice before making a final decision about the fixtures.

Formula One officials will review arrangements for the British Grand Prix at Silverstone, but have confirmed Sunday’s race will go ahead as planned.

The British and Irish Lions will still play New Zealand in the third and final Test on Saturday, with a minute’s silence to be held before kick-off.