Organizers of the 2012 Olympic Games in London say they will review security for next year's Games after three days of riots in the British capital, but they say there will not be a cancellation of Olympic test events planned for this week.

The violence has already led to the cancellation of several football matches, including a friendly between England and the Netherlands, over concerns for fan and player safety. The match had been scheduled for Wednesday night at Wembley Stadium.

Home Secretary Theresa May says Britain takes security at the Olympic Games very seriously and will make sure to look at what is necessary for a trouble-free Olympics. She added that a lot of work has already gone into planning for Olympic security.

The International Olympic Committee expressed its confidence that the Games in London will be safe. A spokesman said security at the Olympic Games is a top priority for the IOC. But he said security is handled by local authorities, who he said “know best what is appropriate and proportionate.”