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Montreal Canadiens forward Alex Tanguay and teammate Mathieu Schneider were both late scratches for Game 3 against Boston. ((Ryan Remiorz/The Canadian Press))

Forward Alex Tanguay and defenceman Mathieu Schneider, both said to be suffering from upper body injuries, were surprise scratches for the Montreal Canadiens for Game 3 of their Stanley Cup playoff series against the Boston Bruins.

The team gave no further information on the two players, who both played the opening two games of the best-of-seven Eastern Conference series.

Tanguay sat out the final game of the regular season, while Schneider missed two of the last four regular season contests with what was believed to be a shoulder injury.

Canadiens defenceman Francis Bouillon, who returned to action in Saturday's game after a two-month injury absence, also didn't dress Tuesday. Bouillon left Montreal's 5-1 loss Saturday in Boston after taking four first-period shifts.

Montreal defenceman Ryan O'Byrne was active for the first time in the series, and left-winger Gregory Stewart made his playoff debut.