Gabriel Aubry -- ARRESTED After Brutal Brawl at Halle Berry's

6:33 PM PT -- Gabriel has been released from custody.

5:55 PM PT -- Gabriel has been booked for misdemeanor battery. According to his booking sheet, he's listed as 6'2" and 180 pounds. He's still in custody and his bail has been set at $20,000.

5:30 PM PT -- Sources tell TMZ ... when Gabriel and Olivier started going at it, Halle rushed Nahla inside the house so she missed the brutality.

3:35 PM PT -- Gabriel has been released from the hospital and is currently at an L.A. jail where he is being booked. Olivier has also left the hospital and has returned to Halle's home.

Gabriel Aubry was arrested Thanksgiving morning after a melee at Halle Berry's house, which sent both Gabriel and Halle's fiance Olivier Martinez to the hospital ... TMZ has learned.

Law enforcement sources tell TMZ ... Gabriel showed up to Halle's house with Nahla for a custodial hand-off. We're told Gabriel was still in the motor court (a rich person's word for a giant driveway) when Olivier walked up to him and said, "We have to move on."

According to witnesses, Gabriel then pushed Olivier and threw a punch at his face, but Olivier blocked it and the punch struck him in the shoulder instead. We're told Gabriel then pushed Olivier to the ground, and Olivier cold-cocked him in the face, and a struggle ensued, ending with Olivier pinning Gabriel to the ground.

In the struggle, Gabriel suffered a broken rib, contusions on his face, and possibly a more serious head injury. Olivier may have broken his hand and suffered neck injuries as well. There are conflicting accounts as to whether Gabriel was rendered unconscious in the fight.

Police were called and Olivier made a citizen's arrest for battery against Gabriel. Gabriel was escorted to the ER and, ironically, Olivier went to the same ER an hour later. The two were just down the hall from each other.

Law enforcement sources tell TMZ ... a judge has issued an emergency protective order, which requires Gabriel to stay 100 yards away from Halle, Olivier, and Nahla.

And finally, there's this ... specifics about the argument between Gabriel and Olivier are sketchy because they were trash talking each other in French.

It's pretty shocking -- considering Gabriel was out with Nahla just last night for a movie date at the Grove.