TAMPA, Fla. -

Hillsborough deputies say a 22-year-old man wielded a kitchen knife at his pregnant girlfriend and punched her in the face, but she fought back and bit off the tip of his finger in self-defense.

Officials charged Reginald Gefferie with aggravated battery on a pregnant female and false imprisonment in the Monday incident. He was taken to the hospital but doctors couldn't reattach the finger tip.

Gefferie is now in jail without bail. It's unclear whether he has retained an attorney.

Deputies say Gefferie and girlfriend Junie Dieujuste were arguing when Gefferie pointed a knife at Dieujuste. Officials say he pushed and punched her in the face.

According to authorities, Dieujuste fought back in self-defense, eventually biting off the tip of the middle finger on his right hand.