Department of Children and Family Services spokesman Armand Montiel told USA TODAY by law the agency cannot confirm or deny investigations.
But TMZ reports the actor, whose wife
TMZ says the case was referred over to the FBI on Thursday due to the fact that the alleged incident happened in the air while the family was on a plane from France last Wednesday.
In divorce documents, Jolie listed the couple's date of separation as the following day, Sept. 15.
People.com reports that Pitt is accused of getting verbally abusive with one of couple's kids, as well as getting physical while the family was on their private plane. People and TMZ both note that Jolie and at least some of the couple's other children were present at the time. Pitt and Jolie have six children: Maddox, 15, Pax, 12, Zahara, 11, Shiloh, 10, and twins Vivienne and Knox, 8.
The Los Angeles Police Department is so far not investigating. "LAPD is not handling any report or allegations into child abuse against Brad Pitt," spokeswoman Officer Jenny Houser told USA TODAY in a statement on Thursday.
Attempts to reach representatives for Jolie and Pitt were not successful.
According to TMZ, Pitt disputes the accusation.
Contributing: Maria Puente