PEORIA, Ariz. - A 2-year-old boy was taken to a Valley hospital after he fell into an above-ground backyard pool Friday, Peoria fire said.

Peoria fire said the boy was found by an adult who started CPR -- which was taken over by paramedics.

The boy later died at the hospital.

It's not know how long the boy was in the water. Peoria police are investigating.