Two people have been arrested on suspicion of murdering a two-year-old boy.
The child died after falling ill at a property on Kilbourne Road, Belper, Derbyshire, at 10.45am on Tuesday.
Police say he was taken to hospital but died a short time later.
Officers have cordoned off a former convenience store and flat above it. Both properties are for sale.
A 41-year-old man and a woman, 32, are being questioned over the boy's death, which is being treated as suspicious.
It is not yet known what caused the toddler's death.
A post-mortem examination was carried out on Tuesday night but detectives are waiting for the results of toxicology tests.
Neighbour Robert Egan told Sky News: "He was a lovely little lad, full of beans, we were all shocked when the paramedics turned up yesterday and the police interviewed us last night". Source