OTTAWA (KDKA/AP) – Sidney Crosby extended his point streak to 24 games with a goal late in the third period, but some mistakes cost the Penguins as their three-game winning streak was snapped Sunday evening in Ottawa.

Mike Fisher and Erik Karlsson scored for the Senators in their 3-1 win.

Marc-Andre Fleury made 21 saves for the Pens. The Sens’ Brian Elliott turned aside 44 shots, including 22 in the second period.

Fisher scored the first of Ottawa’s two power-play goals midway through the first after Crosby was sent off for hooking.

Karlsson’s shot deflected off Pens’ defenseman Paul Martin’s stick and struck Fisher on its way past Fleury. It was the first of Karlsson’s three points.

The Senators’ defenseman then made it 2-0 at 13:42 on a shot from the point during a delayed slashing call against Crosby, who also hooked Chris Phillips late in the second to negate a Penguins power play.

Karlsson’s second goal of the game came on another power-play effort just 20 seconds into the middle period. Jason Spezza assisted on both of Karlsson’s goals.

However, Spezza left moments after the Sens’ third goal after he was checked into the boards from behind by Kris Letang.

Crosby’s 30th goal with 3:22 remaining extended his point streak, which was in serious danger of coming to an end, and dashed Elliott’s hopes for a shutout.

Fleury made a spectacular glove save on Nick Foligno’s penalty shot 10:30 into the third.

Foligno was hooked on a breakaway before he put a backhand through Fleury, but Chris Kunitz was able to scoop the puck away barely before it would have entirely crossed the goal line.

The Penguins return home now for a game against the Atlanta Thrashers on Tuesday at 7 p.m.