James Allen Savage Jr., 29, of 1635 Route 442, lot A11, Muncy, has been jailed on assault-related charges after striking a 5-year-old child in the head with a metal marijuana grinder during a domestic disturbance with his girlfriend at the couple’s home about 11:45 p.m. Tuesday, state police alleged in a criminal complaint.

The assault “caused a severe laceration to the boy’s head which required multiple stitches” to close, police said. The victim was treated at Geisinger Medical Center near Pennsdale.

Savage admitted that he was angry with his girlfriend and “in the course” of throwing the grinder, it hit the child, police were told. An affidavit further stated that Savage told the medical staff that the boy suffered the head injury in a fall.

Following his arraignment before District Judge William Solomon on charges of aggravated and simple assault, endangering the welfare of a child, recklessly endangering and harassment, Savage was committed to the Lycoming County Prison in lieu of $75,000 bail.