Chicago Blackhawks' Shaw sorry for gay slur

Chicago Blackhawks forward Andrew Shaw apologized on Wednesday for a penalty-box outburst that prompted the NHL to launch an investigation into whether he used a homophobic slur.

"Yes we are looking into it, and no we can't comment on it until that process is complete," NHL deputy commissioner Bill Daly told the Chicago Tribune on Wednesday.

Shaw, who was unrepentant on Tuesday night immediately after the Blackhawks' 4-3 playoff loss to the St. Louis Blues, said a later look at the video of himself was enough for him to know he owed an apology.

"I am sincerely sorry for the insensitive remarks that I made last night while in the penalty box," Shaw said in a statement released through the Blackhawks.

"When I got home and saw the video, it was evident that what I did was wrong, no matter the circumstances. I apologize to many people, including the gay and lesbian community, the Chicago Blackhawks organization, Blackhawks fans and anyone else I may have offended.

"I know my words were hurtful and I will learn from my mistake."

Shaw was incensed when he was sent to the penalty box for interference with 2:04 left in the third period.

Chicago were down 4-3 and needed a victory to level the series at two games apiece.

He pounded the glass with his stick, gestured with his gloved hand and shouted at game officials.

"We are extremely disappointed in Andrew Shaw's actions last night," the Blackhawks said in the statement. "His comments do not reflect what we stand for as an organization."

Shaw could face a suspension. Game five in their best-of-seven first-round series is in St. Louis on Thursday, when the Blues will be trying to close out the victory.