Brad Pitt is under investigation for child abuse after he allegedly got "verbally abusive" and "physical" with one of his children with Angelina Jolie on the couple's private plane while their other kids were present, PEOPLE confirms.
The L.A. County Department of Children and Family Services is investigating the allegations after someone anonymously reported the incident last Wednesday on the tarmac, a source tells PEOPLE.
Pitt is accused of getting verbally abusive with one of the couple's kids, as well as getting "physical," a source with knowledge of the situation tells PEOPLE. Jolie was present at the time, along with at least some of their other children.
"The DCFS investigation is absolutely ongoing," the source says. "Brad has been interviewed and is cooperating fully. The case remains open."
The complaint allegedly also claims that Pitt was inebriated at the time.
The LAPD says that it is not investigating Pitt following the allegations.
"LAPD is not handling any report or allegations into child abuse against Mr. Brad Pitt," a spokeswoman tells PEOPLE.
Another source says that Pitt did not return to the L.A. family home with Jolie and the children after the incident. That wasn't unusual, says the source – Pitt would often spend the night at a hotel after arguments with Jolie.
TMZ first reported news of the child services investigation.
A source close to Pitt tells PEOPLE that that he is not taking the investigation lightly.
"He takes the matter very seriously and says he did not commit any abuse of his children," the source says.
"It's unfortunate that people involved are continuing to present him in the worst possible light."
Jolie, 41, filed for divorce and requested sole physical custody of the couple's six children – Maddox, 15, Pax, 12, Zahara, 11, Shiloh, 10, and twins Knox and Vivienne, 8 . In documents filed in court on Monday, Jolie cited irreconcilable differences in ending their marriage of two years.