Police say a 25-year-old woman was found dead and her 18-month-old daughter was found alive inside a car that crashed into a Utah river and wasn't discovered until over 13 hours later.

The girl was flown to a Salt Lake City hospital in an unknown condition. Their names weren't immediately released.

A fisherman found the car upside-down Saturday afternoon in Spanish Fork River in Spanish Fork, about 50 miles south of Salt Lake City.

Police Lt. Matt Johnson says the woman left Salem about 10 p.m. Friday to drive to her Springville home, and a resident said he thought he heard an accident about 11 p.m. but couldn't find anything.

The car was found about 12:30 p.m. Saturday.

Some emergency responders who entered the river were released after treatment for hypothermia at a hospital.