A four-year-old boy died in hospital on Saturday after suffering serious head injuries when a mirror fell on him in a shop.
The child was in the Hugo Boss store at the Bicester Outlet shopping village in Oxfordshire on Tuesday when he was hit by the falling mirror, police said on Saturday evening.
He was taken to the John Radcliffe Hospital in Oxford where he died in the early hours, Thames Valley Police said.
Hugo Boss said its staff were "devastated by this tragic accident".
"We would like to extend our deepest condolences and sympathies to his family," the retailer said in a statement.
"Hugo Boss will assist the authorities in any way with an investigation into the accident."
A spokesman for the company refused to reveal the size of the mirror or give details of how it fell.
The store will remain closed until further notice, he added.
Detective Inspector Steve Duffy of Thames Valley Police said the force was investigating the circumstances of the boy's death.
"We would ask anyone who was in the Hugo Boss store at around that time on Tuesday to please contact us as a matter of urgency," he said.