Canadian authorities plan to release names and charges Thursday against two suspects arrested a day earlier on terror-related crimes.
The Royal Canadian Mounted Police released little detail about the incident Wednesday, stating only that the suspects were arrested under Canada's Anti-Terrorism Act, which passed in 2001.
Two of the suspects are residents of Ottawa, Canada, and more arrests are expected, the Canadian Broadcasting Corp. reported.
The Ottawa Citizen newspaper reported that the suspected ringleader of the group had attended terrorist training camps in the Pakistan and Afghanistan region, leading authorities to believe the alleged plot may have links to al Qaeda.
U.S. authorities were aware of the arrests, and there are no related arrests in the United States, a federal law enforcement official told CNN.
The official said there is no clear link between the Canadian suspects and the United States.
U.S. counter-terrorism officials said they consider the arrests an internal Canadian matter.