Updated: Lindsay Lohan ARRESTED FOR FIGHTING.

Lindsay Lohan was ARRESTED at 4 AM Thursday in New York City for allegedly getting into a fight at a New York City nightclub law enforcement sources tell TMZ. Our sources say Lohan was at Club Avenue when she got into some sort of argument with a female patron and it became physical.  We're told cops came and arrested Lindsay for allegedly assaulting her. At the time of this post Lindsay is still at the police station.

And this isn't Lindsay's only legal problem.  TMZ broke the story ... she is about to be charged with lying to cops in June after her car accident on Pacific Coast Highway.  She told them she was a passenger in the Porsche when actually she was driving.And, if Lindsay is formally charged with the latest crime, it could trigger yet another probation violation.

Video of her arrest below.

UPDATE 7AM ET: We're told Lindsay is still at the police station getting booked for third degree misdemeanor assault, and she's "visibly tired."

7:40AM ET: Lindsay's about to be released with a desk appearance ticket ... meaning she'll have to appear before a judge sometime in the near future. 

8:00AM ET: Lindsay Lohan has been released and was seen leaving the police station with a jacket covering her face.

More Story Details + Pictures of Alleged VictimCollapse )

Lindsay Lohan -- Rocked Out with Justin Bieber Before Nightclub ArrestCollapse )

Michael Lohan Tweets After Lindsay’s Arrest: ‘I Have Tried And Tried’Collapse )

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