PITTSBURGH — An injury to Roberto Luongo put a chill into the Vancouver Canucks' hot streak.

The two-time Vezina Trophy finalist hurt his groin less than five minutes into Vancouver's game against Pittsburgh on Saturday, but Pavol Demitra scored twice and Daniel and Henrik Sedin had three points each in the Canucks' 3-1 win over the Penguins.

Vancouver won its third straight, all on the road, and improved to 7-0-2 in its past nine.

Luongo left the game after collapsing to the ice following what appeared to be a routine save on a shot from the point by Philippe Boucher, Pittsburgh's first of the game. The goalie was helped off the ice without putting weight on his left leg.

"We're not exactly sure the severity of it," said Canucks coach Alain Vigneault, adding that Luongo would be evaluated Sunday after making the trip with the team back to Vancouver on Saturday night.

Curtis Sanford took Luongo's place in goal, stopping 17 of the 18 shots he faced to win for the second time in three days after going 11 months between victories.

"You hate to see your teammate down on the ice like that, he's the biggest part of our team," Sanford said.

The Penguins had only 11 shots through two periods and had failed on four power-play opportunities until Zigomanis scored his second of the season 22 seconds into the third, converting a pass from Tyler Kennedy while in the left faceoff circle.

That was the first goal Sanford had allowed in 100 minutes, 22 seconds against the Penguins, who were 0-for-4 on the power play. Pittsburgh failed to get a point from superstars Sidney Crosby and Evgeni Malkin for second time in three games, but only the third time this season.