The RCMP plan to answer more questions on Saturday about a series of raids and arrests in the Toronto area on Friday.
At least eight people were taken into custody on terrorism-related charges, though there is little more information available.
More than 100 officers were involved in the sweep, including members of the Integrated National Security Enforcement Team.
More arrests and more charges are expected overnight.
The RCMP will release more details at a news conference on Saturday.