ALLEGATIONS Brad Pitt was abusive on a private plane the week before last relate to the actor’s treatment of his 15-year-old son, sources said Friday, as the FBI continued to gather information before determining whether to open an investigation.

    FBI spokeswoman Laura Eimiller said the agency hasn’t made a decision on a formal investigation into what occurred on a plane ferrying Pitt, his wife Angelina Jolie Pitt and their six children.

    Several news outlets have reported that a child welfare agency in Los Angeles is investigating the well-being of the children, who range in ages from 8 to 15.

    Sources familiar with the allegations, but not authorized to speak publicly, say the child welfare investigation centers on Pitt’s conduct toward his son Maddox, 15, during an argument on the Sept. 14 flight. No law enforcement agency responded to the plane when it landed in Minnesota after the incident.

    Amara Suarez, a spokeswoman for the Los Angeles County Department of Children and Family Services, said the agency could not confirm whether it was investigating Pitt or the well-being of the former couple’s children.

    Calls to the offices of Pitt’s attorney, Lance Spiegel, and Jolie Pitt’s lawyer, Laura Wasser, were forwarded to recorded messages stating their firms do not comment on clients.

    Jolie Pitt and her children are staying at a rented house in L.A.

    (SD-Agencies)