The Kansas City Chiefs have suspended running back Larry Johnson until November 9 for "conduct detrimental to the club."

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Johnson had been ordered to stay away from training and team activities on Tuesday while the club and the NFL investigated alleged comments made by the player.

According to the Kansas City Star, Johnson posted demeaning comments, directed at Chiefs coach Todd Haley, on his Twitter feed hours after Sunday's 37-7 loss to the San Diego Chargers.

The newspaper reported Johnson used derogatory language in a reply to a follower on Twitter and also to a reporter on Monday.

The Star said Johnson had issued a statement to them, through his agent, apologising for his behaviour and language used.

"I want to apologise to the fans of the Kansas City Chiefs and the rest of the NFL, Commissioner (Roger) Goodell, the Chiefs organisation, coach Todd Haley, his staff, and my team mates for the words I used yesterday," he said.

"I regret my actions. The words were used by me in frustration, and they were not appropriate. I did not intend to offend anyone, but that is no excuse for what I said."