This is getting more serious by the minute ...

Apparently, the shocking child abuse claims made against Brad Pitt, alleging that the actor was physically and verbally abusive while intoxicated on a private plane last Wednesday are being handled by the FBI, according to TMZ.

Earlier today we reported that Pitt is under investigation by the L.A. County Dept. of Children and Family Services for child abuse after someone on the flight anonymously reported the abuse to authorities.

Allegedly, the World War Z star got wasted and went crazy, and when the plane landed around 8pm, he continued to rage on the tarmac and even tried to flee the scene in one of the fuel trucks. Yikes!

After the call, DCFS notified the LAPD and law enforcement sources say the LAPD's Abused Child Unit (ACU) got the report, but because the incident happened on the air during a flight from France to the States, the LAPD doesn't have jurisdiction.

The outlet is reporting that the ACU did its investigation and then closed the file, referring the matter to the FBI.

The couple have already been interviewed by DCFS, and they plan to interview all six kids too. The investigation is ongoing.

"He takes the matter very seriously and says he did not commit any abuse of his children. It's unfortunate that people involved are continuing to present him in the worst possible light," a source close to the A-list hunk told the news outlet.

Pitt sources have also said that the actor denies committing any sort of abuse.