Canada's electronic eavesdropping agency reportedly tracked the wireless devices of thousands of travellers at a major Canadian airport.
The C-B-C, citing a document supplied by U-S whistleblower Edward Snowdown, says information was gleaned from free Wi-Fi internet service.
The network says the document indicates the Communications Security Establishment Canada received the collected data over a two-week period.
The document further shows the agency was able to track travellers as they showed up in other Wi-Fi locations across Canada.
Ontario Privacy Commissioner Ann Cavoukian told the C-B-C it's ``unbelievable'' that the agency would engage in this kind of surveillance.
She said it ``resembles the activities of a totalitarian state.''
The major airport cited in the report was not identified.