With Canada up 2-1 and zeroes on the clock, several players got into it right in front of the winners' goal, resulting in a two-minute roughing penalty for Canada's Marie-Philip Poulin and four minutes for USA's Monique Lamoureux.
Afterwards, there was a lengthy review by the referees when the Americans refused to leave the ice without confirmation they didn’t score before the final buzzer, but it was deemed no goal.
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The Canadians remained perfect to clinch Group A. If the US team wants another shot at their arch-rivals, they'll have to find it in the gold medal game next Thursday.