Charges have been filed against a West Valley man who allegedly knocked his 11-month-old son unconscious during a fight with the baby's mother Sunday.

The mother told police she was holding the baby in her arms when the man began to hit her repeatedly on the head with a beer bottle, which resulted in a large bruise to her head, according to 3rd District Court charges filed Thursday.During the last swing, the man hit the child on the back of the head with the beer bottle, causing the child to lose consciousness, the charges state.

The child was taken to Primary Children's Medical Center, where he was diagnosed with a contusion.

The man, 32, was charged with child abuse and aggravated assault, both third-degree felonies. He is being held at the Salt Lake County Jail in lieu of $50,000.