KANSAS CITY, Mo. — Chiefs president Carl Peterson said tonight the team is aware of an investigation into running back Larry Johnson's alleged involvement in an altercation with a woman during the team's bye week.

Johnson already faces a December court date on a charge of simple assault involving an incident with a woman in February. He also was benched for Kansas City's 34-10 loss to Tennessee on Sunday for violating team rules.

The alleged bye-week altercation occurred at a Kansas City nightclub. No charges have been filed.

"We are aware of the most recent incident involving Larry Johnson and we are very disappointed with his involvement," Peterson said in a statement.

"We will cooperate fully with the Kansas City authorities who are investigating the matter. We have also made the NFL office in New York aware of the incident and officials there are conducting their own independent investigation. Based upon the NFL Player Conduct Policy, we will have no further comment."

NFL spokesman Greg Aiello declined comment.

ESPN.com was the first to report the alleged altercation.

Team spokesman Bob Moore told The Associated Press the latest investigation was not what prompted coach Herm Edwards to deactivate the 28-year-old Johnson for Sunday's game. Edwards has said it was a violation of unspecified team rules.

With Johnson benched, the Chiefs managed just 58 yards rushing against the unbeaten Titans. He ran for 198 yards against Denver in their only victory this year.

Johnson, a two-time Pro Bowler, has been tied to a handful of similar incidents since the Chiefs drafted him in the first round out of Penn State in 2003.

A 26-year-old woman accused Johnson of pushing the side of her head with an open hand at the Grand Emporium Saloon on Feb. 24, telling her "don't touch me" as he made his way through the club.

In 2004, Johnson agreed to enter a domestic violence diversion program after a former girlfriend said he brandished a gun during an argument. Charges of aggravated assault and misdemeanor domestic battery were dropped.

Johnson has rushed for 417 yards and three touchdowns for the Chiefs (1-5), whose open date was last Sunday.

Johnson missed eight games last year with a broken foot after holding out during training camp and signing a $45 million, six-year extension that included $19 million in guaranteed money.