Celebrity Rehab” star Frankie Lons the mother of singer Keyshia Cole is back in jail this morning after cops say they found her in possession of “drug-related material” sources say.

Law enforcement say cops stopped Frankie for a routine traffic violation yesterday when they noticed an active warrant out for her arrest stemming from a probation violation.

We’re told cops then performed a search and found “drug-related material” on her person.

Lons was arrested and transported to a nearby jail where she was booked for the probation violation and misdemeanor possession of drug-related material.

This morning, Lons is still in custody.