SACRAMENTO, Calif. — A man has been arrested on suspicion of beheading his 1-year-old son, northern California authorities said.

The Sacramento County Sheriff’s Office said in a statement Friday deputies responding to an early morning family disturbance call found a woman outside a home who told deputies her husband, Andrey Demskiy, 28, assaulted her and her mother.

Deputies forced their way into the house when they learned Demskiy was inside with the boy. As they took him into custody, they found a “severed child’s head” in the bedroom where Demskiy was detained.

Detectives said Demskiy used a knife to behead his son after his wife and mother-in-law left the house, according to the statement. He was in custody and ineligible for bail, and is scheduled to appear in court Tuesday.