Child protective services investigating HALLE BERRY after a vicious Turkey day brawl between her fiancé and baby daddy.

The L.A. County Department of Child Protective Services will be formally re-opening an abuse investigation involving Halle Berry and Gabriel Aubry’s's daughter,Nahla, following the Thanksgiving brawl between her father, Gabriel Aubry, and her mother's current boyfriend, French actor Oliver Martinez, RadarOnline.com reported.

"Detectives from the LAPD formally contacted CPS after Gabe’s arrest , because Nahla was present when the fight occurred," a source close to the situation said.

"Nahla wasn't actually involved in the melee, and by all accounts, Halle whisked her out of the driveway as soon as the fight between Oliver and Gabe started. However, DCFS was contacted because there has been a history of allegations of physical abuse. Social workers will be interviewing Halle, Gabriel and Olivier about what happened on Thanksgiving. DCFS must ensure that Nahla's environment is safe."

While dropping Nahla off with Halle on Thanksgiving morning, Aubry got into a knock-down, drag-out brawl with Martinez. The cops were called, and both men ended up getting treatment at Cedars-Sinai Medical Center in Los Angeles.

Aubry was booked on suspicion of misdemeanor battery, posted a $20,000 bond and has a December 13 court date.

Meanwhile, Halle has reportedly gotten an emergency restraining order to keep Aubry away. The two have been in an ongoing child custody battle.

Berry was recently shot down by a Los Angeles judge who ruled that she couldn't move with Nahla to France, because Gabriel lives in Southern California.