A Tennessee woman was arrested Tuesday and charged with first-degree murder after her twins, who were born prematurely days earlier with drugs in their system, died at the hospital.

Tiffany Marie Roberts, 29, of Chattanooga, Tenn., was also charged with viable fetus as victim and aggravated child abuse or neglect in connection with her infant children’s deaths.

Roberts tested positive for drugs in her system, including cocaine, oxycodone, Roxicodone, methamphetamine, and benzodiazepine drugs, on three different occasions when she went into the doctor for check-ups while she was still pregnant, court documents said.

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Roberts also allegedly admitted to taking ecstasy the same day her twins were born, the arrest affidavit said. Both babies died two days later at Children's Hospital, Fox Chattanooga reported.

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The woman also tested positive for several narcotics, including cocaine, at the time the twins were born, court documents said.