Police in Edinburgh are waiting for the results of tests on a one-year-old baby girl to discover if she has been suffering from the effects of heroin.
The baby is currently receiving hospital treatment
It is understood that paramedics found the girl unconscious at her home in the Wester Hailes area of the city.
A Lothian and Borders Police spokeswoman said the baby was in a stable condition.
She added: "We are investigating the circumstances that led to an infant needing hospital treatment."
The child is being treated at the city's Royal Hospital for Sick Children.
Paramedics were called to the home of the child's grandmother in Wester Hailes on Thurday and found the girl unconscious. It is thought she may have swallowed some form of the drug.
They managed to revive her before transferring her to hospital.
Police are waiting for the results of toxicology tests and declined to comment further "while inquiries were ongoing".