A teenage father has been arrested for allegedly biting off the nose of his infant son, causing a skull fracture and brain hemorrhage.

Police say 18-year-old Joshua Cooper, of Fairfield, Calif., "bit the child's nose off while he was crying and he was frustrated he was not able to ease the child's crying." He has been charged with child cruelty and aggravated mayhem.

"There was a substantial amount of blood," Fairfield Police Sgt. Troy Oviatt told KXTV. "It was a fairly gruesome scene."

The baby is in stable condition at an Oakland hospital, but one third of his nose is missing. Police are investigating how he sustained the other head injuries.

Neighbors were shocked at Cooper's arrest. One told the local news station he was a proud new father.

[H/T: Time, Photo Credit: Fairfield Police Dept.]