(CNN) - Comedian Tracy Morgan is suing Walmart over a deadly limo bus crash on the New Jersey Turnpike that left him critically injured.
The complaint was filed Thursday in the U.S. District Court in New Jersey.
Morgan, 45, suffered broken ribs, a broken nose and a broken leg in the crash in the early morning hours of June 7. His friend and fellow comedian James McNair was killed and others were injured.
The Walmart truck that rear-ended Morgan's limo was traveling 20 mph over the speed limit and its driver was almost at his drive time limit, according to a preliminary report by the National Transportation Safety Board.
According to the complaint filed by lawyers acting for Morgan and three others, the truck driven by Walmart employee Kevin Roper collided with the rear end of Morgan's vehicle.
"The defendants' negligence was a substantial contributing factor in causing plaintiffs' injuries," the complaint states.
Roper, from Jonesboro, Georgia, pleaded not guilty last month to criminal charges that include vehicular homicide and assault by auto.
Morgan was a regular on "Saturday Night Live" for seven years and later received an Emmy nomination for his role in the comedy series "30 Rock."
The New York City native made his reputation with over-the-top characters and impressions of celebrities such as Mike Tyson and Oprah Winfrey.
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