BOSTON -- Sophomore Sarah Lefort notched her second career hat trick and senior captain Louise Warren had a career-high four points as No. 9 Boston University defeated Northeastern 5-2 on Tuesday night at Matthews Arena.

BU (12-3-1, 8-0-0 WHEA) extended its Hockey East win streak to 23 games and finished the calendar year without a league loss. The Terriers won 20 conference contests in 2013, including four against Northeastern (7-10-1, 3-5-1 WHEA).

The teams were deadlocked 2-2 early in the third period before Warren and Lefort broke the game wide open. Warren, who broke a 2-2 tie in overtime of the teams' last meeting at Northeastern on Oct. 29, reprised her role on Tuesday when she tallied a shorthanded goal at the 8:40 mark of the third. Lefort followed with a pair of goals, including an empty-netter, to seal the victory. The duo was responsible for all five Terrier goals.

No. 3 Cornell 5, Syracuse 2

SYRACUSE, N.Y. -- Sophomore defenseman Cassandra Poudrier scored two power-play goals and freshman goaltender Paula Voorheis stopped 39 shots, as the No. 3 Big Red came back from an early two-goal deficit to beat Syracuse 5-2 at the Onondaga War Memorial.

This is the second time this season Poudrier has netted two goals with the man advantage, having also done so in Cornell's 8-1 win against Union on Nov. 9. All of the sophomore defenseman's five goals this season have come in man-up situations.

Voorheis made her first collegiate start against the Orange, and earned her first career victory, as she is now 1-1-0 in three career appearances. She showed some nerves early on but clearly gained more confidence with every save, stopping a number of shots through traffic and moving well across the crease to quell rebound chances late in the game.