An unnamed NFL player is suing United Airlines, alleging that he was sexually harassed, assaulted and violated by a female passenger on a February flight from Los Angeles to Newark, New Jersey, and that the airline failed to properly respond to complaints.

The civil suit, filed Monday in Los Angeles County Superior Court, seeks unspecified statutory and punitive damages from the airline.

According to the lawsuit, the player and another passenger in the same row made four complaints to flight attendants that the woman was making "unwanted sexual advances" before she was moved to a different seat.

The two men are suing United, the lawsuit says, because the airline refused to give them the name of the woman, the flight attendants and potential witnesses and because the airline failed to follow policies to respond to sexual harassment and assault on the Feb. 10 flight.

According to the lawsuit, the men first alerted flight attendants that the woman was disruptive and belligerent and appeared to be intoxicated. They notified the flight attendants again when the woman made sexual advances toward the NFL player, massaging his knees and thighs. More than an hour into the flight, the woman's advances intensified, the men allege, and she allegedly grabbed and groped the player. Flight attendants again were notified.

The woman continued her advances, the lawsuit says, pulling off the protective face mask the player was wearing and grabbing his genitals. At that point, the player jumped up from his seat and complained in front of the entire plane that the woman was touching him. The player went to the rear of the plane and again notified a flight attendant. That's when the woman was removed from the row, according to the lawsuit.

The lawsuit alleges that United's failure to have or enforce adequate policies and procedures for the prevention of and response to in-flight sexual assaults is a breach of its duty to protect and care for its passengers.