Discuss as:

Family pit bulls maul 2 California toddlers in separate incidents

Two San Francisco Bay Area toddlers were mauled by family pit bulls less than 24 hours apart, officials said Tuesday.

Both victims, one from Castro Valley and one Concord, were reported recovering in Oakland Children’s Hospital, television station KTVU reported. Neither child was identified.

The hospital would not disclose any information about the victims.

The dog in the Concord attack on Monday was euthanized, officials said.

The Castro Valley incident occurred about 2 a.m. Tuesday. Alameda Sheriff’s Department Sgt. J.D. Nelson told KTVU that a pit bull-German shepherd mix was in custody of animal control, KTVU reported.

Nelson called the youngster’s injuries worse than those suffered by the 2-year-old Concord girl on Monday.

The Concord toddler was stable but faces a lengthy recovery, KTVU said.

The dog bit her on the head, face and leg, according to animal control. She was treated at the scene and then airlifted to the hospital.

The euthanized dog’s tissues were being tested for rabies, officials said.

Contra Costa Animal Services Lt. Joe De Costa told KTVU officials were investigating whether the Concord family had any knowledge of the dog's having a history of aggression.

If so, family members could face criminal charges, De Costa said. "At this point, it doesn't appear that that is the case," he added.

More content from msnbc.com and NBC News:

Follow US News on msnbc.com on Twitter and Facebook