Eaton Centre Shopping Mall In Toronto
People go shopping in the Eaton Centre shopping mall as they walk by a giant Christmas Tree in Toronto, December 7, 2012. Reuters/Mark Blinch

Canadian authorities have uncovered a potential terror attack rampage. It will be executed by ISIS imitators against U.S. and Canadian targets inside Canada.

The report talked of "knife and gun" attacks at "public places" in Canada. It was mentioned the attack could happen in an unnamed shopping mall or at the U.S. Embassy. NBC News broke out the initial report.

Apart from U.S. citizens, "other U.S. and Western targets in Canada" were likewise mentioned. Sources told media outfit the planned attacks were at the "aspirational" stage. But authorities said they will put additional people around public buildings in coming days as part of increased security and police visibility.

Officials are theorising the terror attacks could involve a beheading of an innocent person in a public place. Another possible theory is that a number of citizens will be slashed on their necks at a crowded street, only to be stopped when police arrive to shoot and "martyr" the terrorists.

Read: 80 Canadians Under Police Radar, Suspected ISIS Fighters

The mall terror plan, on the other hand, will be carried out as the group mows down people on crowded escalators. As with the other plan, the terrorists will not stop until police presence arrives at the scene.

"While I cannot comment on operational matters of national security, I can say that security agencies are constantly evaluating the terrorist threat and taking action to protect Canadians," Jason Tamming, spokesman for Canada's Minister of Public Safety Steven Blaney, told NBC News.

Andre Gerolymatos, a Simon Fraser University History professor, told News1130 any future attacks in or against Canada won't be near anything to the September 2011 chaos. "The attitude and the policy of ISIS is not really high tech sabotage or terrorism, their position has always been to use low tech, you know someone like that going to a mall, shooting and stabbing people."

He labeled the ISIS' style as "diffused terrorism" or something that is very "low tech." Compared with Al Qaeda that prefers to stage all-high drama including all the fireworks fit for a "big spectacular terrorist act, a mega explosion," Gerolymatos said ISIS seems to be the opposite. "ISIS is much smarter because it can inspire their followers or their potential followers by simply saying do something small for the cause, go and kill somebody, go and cut somebody's head off,'" he said.