Four police officers who found a baby in a submerged car said they were guided by a woman’s voice, asking for help.

The Utah officers rescued the 18-month-old baby girl who was dangling from her car seat after a crash that killed her mother, Lynn Groesbeck, 25.

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They discovered the car and turned it over when they found baby Lily unconscious but alive.

But since then, the police officers have been asking whose voice they heard.

Officer Tyler Beddoes said: ‘For two nights I’ve laid awake trying to figure out exactly what it could be. All I know is it was there, we all heard it.’

He added: ‘That’s the part that really sends me for a whirl. I’m not really religious, but that’s what you think of.’

‘We all got together and we all heard the same type of thing. We just can’t grasp what we were hearing.’

When Lily was discovered she was wearing just a flannel onesie and didn’t have any hat or gloves on.

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A firefighter freed her by cutting the straps while officers formed a line in the river and handed the cold girl to one another until she was on the shoreline and in emergency workers’ arms.

They rushed her to an ambulance and performed CPR, officer Beddoes said yesterday, two days after the crash.

She is now in stable condition and improving, according to hospital officials. Beddoes, who spoke with the family, said the baby is opening her eyes and doing well.

Police believe the accident occurred when Mrs Groesbeck, struck a cement barrier on a bridge and into the river late Friday in Spanish Fork, about 50 miles south of Salt Lake City.

She was driving to her home in Springville after visiting her parents in Salem, Spanish Fork police Lt. Matt Johnson said. Investigators don’t know what caused the crash, he said. There were no skid marks or signs of mechanical failures in the car.

Police don’t suspect drugs or alcohol as a factor but are awaiting toxicology test results. Maybe Lynn Groesbeck was tired or distracted, Johnson said, adding authorities weren’t ruling anything out.

Lynn Groesbeck was enrolled at Provo College with a goal of becoming a medical assistant, her sister Jill Sanderson told the Deseret News.

Even though the road that goes over the bridge gets plenty of traffic, no one saw the wreck because the cement barrier obstructed the view of below, Johnson said. If the fisherman didn’t choose that river that morning, it could have been several more hours, he said.