Kreider sustained an apparent left leg injury in Thursday's game versus the Bruins, Eric Engels of Sportsnet reports.
There was no update on Kreider's status after the game, but the incident didn't look good. Kreider left the game with no weight on his left leg, which could lead to a longer absence. The Canadiens host the Avalanche on Saturday, and the team may have an update on him prior to that contest.