Antioch police are searching for Johnny Madden, 18, who allegedly stabbed his pregnant 16-year-old girlfriend Wednesday morning.
Antioch police are searching for Johnny Madden, 18, who allegedly stabbed his pregnant 16-year-old girlfriend Wednesday morning. ( Antioch Police Department )

ANTIOCH -- Police are searching for an 18-year-old man who stabbed his pregnant girlfriend Wednesday morning, authorities said.

Authorities say Johnny Madden stabbed his 16-year-old girlfriend in her leg and abdomen at 10:36 a.m. on the 2200 block of Hamlin Drive. Madden fled before officers arrived and has eluded capture.

Police said Madden also stabbed the the family dog, a six-month old shepherd puppy, during the incident. The dog needed emergency surgery and had part of his liver removed.

The girl and her unborn child, according to police, were not seriously injured as she suffered non-life threatening cuts.

Anyone with information on the whereabouts of Madden is asked to call the Antioch Police Department at 925-778-2441.

David DeBolt covers breaking news. Contact him in Richmond at 510-262-2728. Follow him at Twitter.com/daviddebolt.