Toronto: Canadian Prime Minister Justin Trudeau said he was working with Australia, New Zealand and other members of the Five Eyes intelligence sharing network after the shock arrest of a top Canadian law enforcement official.

Canadian Prime Minister Justin Trudeau. Credit:AP

There are fears Cameron Ortis, a director-general with the Royal Canadian Mounted Police's intelligence unit, may have exposed highly-sensitive information from alliance members to criminal groups or foreign entities.

Canada, Australia, New Zealand, Great Britain and the United States are members of Five Eyes and any breach of trust could place clandestine operations, informants, witnesses in protection and other confidential activities in danger.

"We are continuing to work with our Five Eyes allies on this matter which the authorities are taking extremely seriously," Trudeau said.