Updated at the bottom: The baby has died. First posted at 7:09 a.m. Tuesday.

Police believe a baby might have been thrown from at least the second story of an Childrens Hospital Orange County building.

In fact, they couldn't find the 3-month-old's parents.

It all happened at a hospital parking structure at 445 S. Main St., according to Orange police, who were called to the address at 6:20 p.m. Monday.

Sgt. Dan Adams:

We don't think this was an accident. We will work all night for a clue or lead that will lead us to the suspect.

Cops were searching the structure for evidence. Adams indicated it was possible it was an accident, but that it sure didn't look like it. “There are no parents here that we know of,” he told the Orange County Register.

The baby was critically injured and taken to UC Irvine Medical Center for treatment, according to KCAL9.

Update: So cops allege that Sonia Hermosillo threw the baby, now said to be 7-months-old, from the fourth story of the parking structure.

They found the woman nearby after her husband contacted La Habra police to report her and the baby missing, police said.

Cops actually found the suspect after she drove past Childrens Hospital in an SUV that had an empty child seat inside, police said.

Update: Our sister publication OC Weekly reports that the mother, 31-year-old La Habra mother, Sonia Hermosillo, has been arrested on suspicion of attempted murder.

Update No. 2: KFI AM 640 tweeted Wednesday afternoon that the baby has died. The Los Angeles Times earlier in the day reported that the mother, whom authorities tried to commit to a mental health-care facility, got her parking ticket validated after allegedly throwing the baby from the structure.

Added: As our sister publication OC Weekly notes, the mother now faces a murder case.

-With reporting from City News Service. Got news? Email us. Follow us on Twitter, too: @dennisjromero.

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