Police are searching a property in Kirkcaldy, Fife which ITV News understands belongs to the sister of Mikaeel Kular's mother.
The three-year-old's mother is believed to have been detained by police following the discovery of a body in Fife shortly before midnight last night.
A timeline of events surrounding the disappearance of three-year-old Mikaeel Kular.
What tools and techniques will police be deploying in their effort to reunite Edinburgh toddler Mikaeel Kular with his family?
Hundreds of people have gathered to join the search for a missing three-year-old boy who was last seen on Wednesday night.