BBCNews has now said the emergency call from 3-year-old Ellie was a hoax, according to its Twitter account.
England police were searching for 3-year-old Ellie, who made an emergency call saying her mother, Stacey Hall, had fallen and was not moving.
More than 24 hours have gone by since Ellie called for an ambulance on Monday morning, reported CNN. The little girl said she had shouted at her mother and shaken her, but that she still didn't move and remained lying on the kitchen floor with a piece of toast in her hand.
"We urgently need the public's help to identify exactly where Ellie and her mum are," said Detective Chief Inspector Lisa Griffin of the West Yorkshire Police.
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Police said Ellie lives in the northern English city of Leeds.
The toddler told operators her house number was 23 and the street name included "Court," according to The Guardian. She said her grandparents lived in Bridlington, East Yorkshire.
"We are hoping that someone out there who knows the family will recognize the pieces of information that the ambulance calltaker managed to get from her and will get in touch," said Griffin. "We are treating this situation extremely seriously as it appears we have a woman in need of urgent medical attention and a vulnerable little girl who will also need our help."
BBC News reported that a team of detectives is making "wide-ranging" inquiries to trace the family, including checks on police systems, hospitals, and the public register of births.
Anyone who thinks they know Ellie and her mother, Stacey Hall, and where they live, is asked to call West Yorkshire police at 0800 056 0944.