A man accused of suffocating his infant son and seriously injuring his toddler daughter has pleaded not guilty to aggravated murder and other charges in southeastern Ohio.

Court officials in Marietta say Adam Baker pleaded not guilty Monday to charges of aggravated murder, attempted aggravated murder and felonious assault.

The Marietta man's public defender didn't return a message seeking comment.

The Washington County prosecutor has said detectives began investigating the 23-year-old Baker after his 2-year-old daughter was taken to a hospital in November because she had lost consciousness. The prosecutor has said the girl suffered brain damage and is now blind and using a wheelchair.

Baker's 4-month-old son died in June. A coroner couldn't determine how the boy died.

Baker's trial has been set for Feb. 18.