World Peace was suspended on Tuesday for throwing a vicious elbow at Oklahoma City's James Harden, keeping the Lakers' starting small forward sidelined for most of the first postseason round.

World Peace was ejected from Sunday's game against the Thunder for striking Harden in the head with the back of his elbow, giving Oklahoma City's top reserve a concussion. The former Ron Artest claimed the blow was an accidental, overzealous celebration of a dunk, yet even Kobe Bryant and his Lakers teammates weren't defending his inexplicable actions.

"It's hard to get into a guy's head and know exactly what happened in that situation," Bryant said. "I haven't really spoken to him about it. You've really got to ask him."

World Peace will miss the Lakers' season finale on Thursday at Sacramento and the Lakers' next six games. The playoffs open Saturday, and Los Angeles is likely to be the Western Conference's third seed -- and Oklahoma City is locked into the No. 2 seed, meaning the clubs could meet right after World Peace's suspension ends in the second round.

He will lose nearly $348,000 in salary if he serves the entire suspension this year. If the Lakers exit the playoffs swiftly, the remainder of the suspension must be served next season.

World Peace still hasn't answered media questions about his actions, but he issued a brief statement on his website, promising to follow up with a podcast.

"I apologize to the Oklahoma City Thunder fans and the OKC organization," World Peace wrote on ronartest.com. "I look foward (sic) to getting back on the floor with my teammates and competing for the Lakers' fans."

Commissioner David Stern alluded to World Peace's lengthy history of on-court altercations and strange behavior in announcing the penalty in a statement. Although Harden appears to be recovering well, he hasn't been cleared to return to the Thunder.

"The concussion suffered by James Harden demonstrates the danger posed by violent acts of this kind, particularly when they are directed at the head area," Stern said in a statement. "We remain committed to taking necessary measures to protect the safety of NBA players, including the imposition of appropriate penalties for players with a history of on-court altercations."

Lakers general manager Mitch Kupchak said the team accepted the latest suspension for World Peace, who has two years left on his contract with Los Angeles.

"His most recent lapse in judgment is not to be condoned or accepted," Kupchak said after praising World Peace as largely a model citizen with the Lakers.

"His actions could have seriously injured another player, and his absence during this suspension will hurt our team as well," Kupchak added. "While we accept the league's decision, we will be supportive of Metta and try to help him be more professional on the court."

The suspension is the third career ban of at least seven games for World Peace, whose rap sheet might not fit on a basketball card at this point.

He got an 86-game suspension in 2004 -- the longest ban for an on-court incident in NBA history -- for jumping into the stands at the Palace of Auburn Hills in the Detroit suburbs to fight fans, and he served a seven-game suspension in 2007 for his no-contest plea on a domestic violence charge.

Even before his odd decision to change his name to promote peace last year, he had largely rehabilitated his image during three seasons with the Lakers, winning the NBA's top citizenship award last spring for his charity work in mental-health awareness. Yet World Peace also slammed his forearm into the face of Dallas guard J.J. Barea in the closing minutes of a home playoff loss to the Mavericks last season, earning a one-game postseason suspension.

World Peace leveled Harden moments after dunking over Serge Ibaka and Kevin Durant in the second quarter of the Lakers' double-overtime victory over the Thunder. While pounding his chest with his right arm, World Peace cocked his elbow and threw it at the back and side of Harden's head.

He claimed the elbow was completely accidental in a brief postgame statement, but later acknowledged on Twitter that the blow "looks bad."

World Peace didn't speak to the media after the Lakers' practice Tuesday, heading to the locker room at the moment media members entered the gym at the Lakers' training complex. But Bryant acknowledged the obvious problem for the Lakers, who lose a starter and their defensive stopper right before the postseason.

"It's an unfortunate situation," Bryant said. "James, from what I hear, is OK. As far as Metta goes, he has to focus on himself, and however many games they give him, they give him. He just has to be prepared, and when he comes back, just step right in and be ready to go."

Bryant and the Lakers are clearly torn between supporting a teammate and recoiling from World Peace's actions. Harden and Bryant are friends.

Oklahoma City coach Scott Brooks declined to make a significant comment about World Peace before the Thunder hosted Sacramento on Tuesday night. Brooks didn't weigh in on the possibility World Peace could return from suspension for a second-round matchup with the Thunder.