Los Angeles police say they have arrested a woman who officers saw try to attack Simon Cowell's ex-girlfriend outside the venue where "American Idol" is taped.

Officer Norma Eisenman says officers arrested Janice Thibodeaux after they saw her try to choke "Extra" correspondent Terri Seymour. She is being held on nearly $54,000 bail for suspicion of felony battery.

Police did not identify Seymour, but a story posted on the "Extra" Web site confirmed the encounter. Seymour refused medical treatment after the incident.

Eisenman says Thibodeaux asked Seymour if she was Cowell's ex-girlfriend before trying to choke her. The 33-year-old ran from officers for a short distance before being arrested.

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