Michael Lohan Arrested -- Domestic Violence

3/22/2011 9:00 AM PDT BY TMZ STAFF
Michael Lohan was arrested Monday night in Los Angeles on suspicion of domestic violence ... TMZ has learned.

Law enforcement sources tell us ... Lohan's girlfriend filed a report with the L.A. County Sheriff's Department between 9:30 and 10:00 PM tonight ... claiming they got into an argument that turned physical ... and she had some visible marking from the alleged incident.

Cops went out and tracked down Lohan -- and arrested him on suspicion of domestic violence.

We're told Lohan was taken to a nearby hospital to be checked for a medical condition unrelated to the alleged attack ... but afterward, he'll be taken to a Sheriff's station to be booked.

Bail has been set at $200,000.

UPDATE:  Law enforcement sources tell TMZ ... Lohan will be charged with domestic violence, false imprisonment, and preventing the reporting of victimization.

Lohan was admitted into Cedars-Sinai Medical Center after complaining of chest pains. 

Story developing.