Gay slurs by Kansas City Chiefs running back Larry Johnson have left him barred from practice and other team activities, reported.

Johnson allegedly used a gay slur in public venues twice since Sunday, including one directed at reporters in the locker room.

On Sunday, Johnson belittled coach Todd Haley in a Twitter post, saying Johnson's father “played for the coach from 'remember the titans'” and Haley “played golf.” He went on to insult a follower, calling his profile picture a “fag pic” and the person a “Christopher street boy,” a reference to being gay.

The next day, while refusing to answer questions from reporters in the locker room, Johnson said, “I'm not talking till Thursday,” then whispered, “Get your faggot ass out of here,” according to The Kansas City Star. Thursday is the team's scheduled press day.

The Gay & Lesbian Alliance Against Defamation (GLAAD), a media watchdog group, immediately called for an apology.

“Professional athletes who use this word need to be held accountable for giving a license to youth to bully their peers,” GLAAD President Jarrett Barrios said on the group's blog. “NFL officials and the Kansas City Chiefs need to take disciplinary action to condemn this and future uses of all anti-gay epithets.”

The team said Tuesday it would investigate both allegations and apparently sidelined Johnson indefinitely.

“The Kansas City Chiefs and the National Football League are continuing to investigate the alleged comments made by Larry Johnson,” the team said in a statement. “Until that review is complete, the Chiefs have instructed Larry to refrain from practicing with the Chiefs or participating in other team activities. A decision regarding Larry's status will be made once the investigation has concluded.”

In a statement released Tuesday, Johnson apologized, saying “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,” he added.

Johnson's apology, however, didn't stop 39-year legendary Kansas City sportscaster Jack Harry to call for Johnson to be sacked, saying he “really crossed the line.”

“Larry Johnson might have tweeted himself off the team,” Harry said in a televised editorial. “Let's face it, he's nothing but a problem maker. But the real reason you want to run him out of town is for the safety of all women in our city.”

Johnson has been arrested four times since 2003 on various assault charges against women. He's currently serving two years probation from two incidents in 2008. One woman claims Johnson threw a drink at her, while another says he pushed her head at a nightclub.