Tributes have been paid to a "beautiful" seven-year-old boy found dead at a house in Birmingham.
Hakeem Hussain was found at the property in Cook Street, Nechells, on Sunday, police said. The Birmingham Mail reported he died from suspected hypothermia.
A post-mortem examination has proved inconclusive and further tests will be carried out to establish how he died.
Birmingham City Council confirmed Hakeem was known to the authority.
A man, 56, and a 35-year-old woman arrested on suspicion of wilfully ill-treating a child have been released under investigation.
Julie Wright, head teacher at Nechells E-ACT Academy, where Hakeem was a year three pupil, said Hakeem was "a most beautiful little boy, a great friend to many staff and children with a wicked sense of humour and an infectious giggle".
"He was a warm and generous-hearted soul who was talented across many areas of the curriculum but especially so in music and the arts.
"Hakeem will be sorely missed by us all."
She added his performance as the "Christmas star" in a nativity play last year "will stay with me forever as he totally stole the show".
"There wasn't a dry eye in the house as he delivered his lines with poignancy, grace and humour," Ms Wright added.
The Birmingham Mail said it understood Hakeem, also known as Hakeem Mahmud, may have been outdoors in near freezing temperatures for some time before he was found dead.
West Midlands Ambulance Service was called to a property in Cook Street just after 07:30 GMT on Sunday following reports a boy had suffered a cardiac arrest.
He was pronounced dead at the scene.
The city council said: "The multi-agency Birmingham Safeguarding Children Board is aware of the case and will decide whether it meets the criteria for a serious case review."
Det Insp Jim Munro, from the Public Protection Unit at West Midlands Police, added the force was continuing "to build up a picture of the circumstances surrounding his death".