Threats against Winter Olympics sponsors worry Canadian officials

Intelligence report says extremist, terror groups may target Vancouver Games

''If the police knew who'd done it, they would have arrested them, and they haven't. So it could be anybody.''

The Royal Bank refused an interview request, but said in a statement it believes most people don't support vandalism against sponsors, adding that the safety and security of employees, clients and suppliers are the bank's top priorities.

''We have numerous security measures in place to protect them and will continue to assess and enhance our security procedures as required,'' the bank said.

''RBC respects the right of people to express their opinions as long as it is done in a peaceful and respectful manner. We accept that there will always be critics; we would only hope that criticism will be constructive and truthful.''