The L.A. County Department of Children and Family Services is at Halle Berry's home right now ... interviewing her over claims that baby daddy Gabriel Aubry had put 3-year-old Nahla in harm's way.
Law enforcement sources tell TMZ ... the visit to Halle is routine -- whenever there's a claim of abuse or neglect, DCFS will interview both parents. It underscores that DCFS is not blowing off the nanny's claim -- that Gabriel allegedly pushed her against a door with the kid in her arms.
The nanny also claims Gabriel has violently yanked Nahla out of her arms.
There is also a criminal investigation to determine if Gabriel committed the crimes of child endangerment or battery.