A man used a samurai sword to sever part of his girlfriend's hand during a quarrel, police said, and surgeons were trying to reattach it Thursday.
Bradon Burnett, 21, was arrested Wednesday at his home in Wilkinsburg, in suburban Pittsburgh, police said.
Officers found the woman in the street outside with her hand severed between the fingers and through the palm, said Wilkinsburg Police Chief Richard Dwyer.
Officers found the severed portion of the hand inside the residence and gave it to paramedics, police said.
Police and UPMC Presbyterian hospital in Pittsburgh, where the woman was undergoing surgery, declined to release her condition or identity.
Burnett, who had a sword with him when he was arrested, was arraigned on charges of attempted homicide, aggravated assault and domestic violence, and was jailed, Dwyer said.