Environmental health inspectors are joining police in an investigation into the death of a four-year-old boy who was hit by a falling mirror in Bicester Village on Tuesday.
The little boy died in the John Radcliffe Hospital in Oxford in the early hours of Saturday after suffering serious head injuries.
Police said the child had been in the Hugo Boss store when he was injured at about 8.40pm on Tuesday.
Inspectors from Cherwell District Council (CDC) are due to join police investigators and Health and Safety Executive officials as part of the probe.
CDC said its officers are providing assistance with the health and safety aspects of the investigation.
The council said its thoughts are with the family at this difficult time.
On Saturday, Hugo Boss said its store in Bicester Village would be closed until further notice.
The statement added: “Everyone at Hugo Boss is devastated by this tragic accident and we would like to extend our deepest condolences and sympathies to his family.
“All of our thoughts are with them at this time. Hugo Boss will assist the authorities in any way with an investigation into the accident.”
The investigating officer for Thames Valley Police, Det Insp Steve Duffy, has appealed for any witnesses to come forward.
Anyone with information should contact Thames Valley Police on the non-emergency number 101.