Jean-Gabriel Pageau got his first career hat trick Sunday to lead the Senators in a fight-filled 6-1 victory over the Montreal Canadiens at Ottawa.
The teams combined for 232 penalty minutes and nine players were given game misconducts.
The Senators have a 2-1 lead in the best-of-seven series and Game 4 is Tuesday.
The third period started out with the Senators leading, 2-1, but after Pageau’s second goal of the night and a Kyle Turris goal at 7:00, emotions overflowed and a line brawl broke out at center ice.
Pageau, who was born in Ottawa, scored his second of the game at 1:18 of the third period to give the Senators a 3-1 lead. Full story for BostonGlobe.com subscribers.