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Canadian airports remained on heightened alert Tuesday after renewed fears of a terrorist threat led Transport Canada to issue a warning to "exercise increased vigilance."
"There's some specific information that certainly causes me concern, causes our security officials concern, and I think we've got to maintain heightened vigilance at this time," said Transport Minister John Baird.
Baird said new, specific information about a potential attack led his agency to issue the warning, which comes in the wake of the thwarted Christmas Day attack on a U.S. airliner.
Baird wouldn't discuss the threat specifically, but he said it's not considered imminent and isn't anything like 9-11. The warnings are not meant to create panic, he said.