Children's Services Show Up for Mel Hearing

7/15/2010 1:30 PM PDT
TMZ has learned ... a rep from the L.A. County Department of Children and Family Services just showed up at the Mel Gibson/Oksana Grigorieva hearing.

Oksana claims Mel hit her while she was holding their baby.

In addition to the Children's Services rep, we've learned a sergeant from the Sheriff's Department, Special Victims Bureau, has also arrived.