A Northern California couple has pleaded not guilty to killing two young children and abusing a third in the woman's care.

Tami Huntsman and her 17-year-old boyfriend are accused of abusing to death a 6-year-old boy and a 3-year-old girl, stuffing their bodies in a plastic bin and storing them in a rented storage unit in Redding, California.

The pair is also charged with abusing a 9-year-old girl, who was found starving and with broken bones in the back of an SUV parked in Quincy, California.

The three victims were siblings and in the custody of 39-year-old Huntsman. The three victims lived with Huntsman, her boyfriend and in Salinas. Investigators believe the children were killed in Salinas due to sustained physical abuse and neglect.