Police are appealing for two witnesses to come forward as they may have information that could assist the investigation of murdered 10-year-old Kane Morris.
As a result of the ongoing enquiry, it is believed that two men have passed the property on Union Street, Coupar Angus, around the time of the incident during the early hours of Sunday morning.
Detective Inspector Ross Fitzgerald from the Major Investigation Team said: “We believe the two men may have heard a disturbance at around 2:05am on Union Street on Sunday and would urge them to speak to us.
“Our enquiries remain ongoing in order for us to establish the full circumstances of what happened and we continue to urge anyone who hasn’t spoken to us already to do so.
“A 37-year-old man remains under arrest in connection with the incident. An 8-year-old girl who was also injured during the incident remains in a critical but stable condition in hospital.
“Local officers will also be in the community conducting additional patrols over the next few days as our investigation continues.
“Anyone with information is asked to contact Police Scotland on 101 quoting incident 611 of 11 November. If you wish to remain anonymous, you can contact the independent charity Crimestoppers on 0800 555 111.”