Police say security at the southern Alberta university reported that two men were walking around the campus with handguns on Tuesday.
The suspects were quickly taken into custody.
Both men say there were enacting the video game Call Of Duty.
Brad Keller, who is 21, and Anthony Small, who is 25, have been charged with possession of a weapon dangerous to the public.
The two Lethbridge men are to appear in court March 25.
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