Tyler Seguin scored the decisive goal in a shootout and the Boston Bruins beat the Philadelphia Flyers 6-5 on Sunday.

The Northeast Division-leading Bruins haven't lost in regulation in Philadelphia since March 10, 2007, going 9-0-1. The defending Stanley Cup champions are tied with the New York Rangers for first place in the Eastern Conference.

Patrice Bergeron, Seguin, Milan Lucic, David Krejci and Gregory Campbell scored Boston's goals.

Scott Hartnell scored a natural hat trick in the second period and Max Talbot had two goals for Philadelphia.

Tim Thomas stopped Wayne Simmonds to win it after Seguin beat a sprawling Ilya Bryzgalov in the shootout.

Philadelphia's Matt Read missed the net on the first shot against Thomas. David Krejci then scored for the Bruins. Claude Giroux answered for Philadelphia, becoming the first person to score on Thomas in 10 shootout shots this season.

The injury-riddled Flyers, already missing captain Chris Pronger for the rest of the season because of a concussion, played without Danny Briere (concussion) and Jaromir Jagr (lower body injury). Both players were injured in Saturday's 4-1 win at New Jersey.

Leading 4-3 to start the third, the Flyers failed to become the first team to overcome a two-goal deficit against Boston this season.

Krejci redirected Rich Peverley's shot to tie it at 4 just 1:19 into the third period. Campbell scored the go-ahead goal less than four minutes later when he tapped in Daniel Paille's wraparound shot.

Talbot tied it at 5 when he tipped Matt Carle's slap shot past Thomas during a power play.

These teams have become rivals after meeting in the playoffs the past two seasons. The Bruins won their sixth Stanley Cup title last year, sweeping Philadelphia out of the Eastern Conference semifinals in the process. In 2010, the Flyers overcame a 3-0 series deficit and 3-0 deficit in Game 7 and beat Boston in the semis.

The shaggy-haired Hartnell, having the best season of his career, scored three straight goals to give the Flyers a 4-3 lead in the second. He leads the team with 25 goals, five shy of his career high set in 2008-09.

Hartnell got Philadelphia within 3-2 on a power-play goal a few minutes into the period when he blasted a one-timer while down on one knee.

Hartnell then scored a nifty goal to tie it at 3. He caught a pass from Claude Giroux, dropped the puck, turned around and lifted a shot over defenseman Adam McQuaid that fluttered above Thomas' stick.

Hartnell put the Flyers up 4-3 in the final minute of the period. He lost his stick during the shift, skated over to the bench to grab another one, returned to the circle and ripped another shot past Thomas.

Fans littered the ice with hats to celebrate Hartnell's sixth career three-goal game and first since Dec. 20, 2008. With only 46.5 seconds left in the second, players went back to their lockers and added the extra time to the final period.

Bergeron scored his 15th goal to give the Bruins a 1-0 lead just 50 seconds into the game.

Talbot tied it at 1 when his crossing pass to Jakub Voracek hit off Bruins defenseman Dennis Seidenberg, bounced off Thomas' pads and went in.

But the Bruins answered with two goals in a span of 3:29 to go up 3-1.

Seguin scored his 18th goal near the midpoint of the first. Lucic then fired a shot from the slot over Bryzgalov's shoulder to put Boston ahead 3-1.

There were two fights and another scuffle during a feisty first period. Tom Sestito, just recalled by the Flyers because of the injuries, dropped the gloves against Lucic early in the game. Later, Boston's Chris Kelly went after Brayden Schenn after the rookie delivered a crushing check on Steven Kampfer. Bryzgalov then got a roughing penalty that precipitated a shoving match.

Players squared off two more times during the game. The Flyers and Bruins are the two most penalized teams in the NHL.

Notes: Bruins D Andrew Ference was suspended three games without pay by the NHL for boarding New York Rangers defenseman Ryan McDonagh during overtime of a 3-2 loss on Saturday. The suspension will cost Ference $36,486.48. ... Hartnell has four two-goal games this season and 25 in his career. ... Shelley surpassed 1,500 career penalty minutes with his fight. ... Briere is out indefinitely. He's the sixth Flyers players to sustain a concussion this season. ... Jeff Carter was the last Flyer to score a natural hat trick on Nov. 11, 2010. ... Boston is 24-0 in games in which it has led by two goals at any point.