Assistant Commissioner Scott Duvall says an incident that shut down Westfield Marion in Adelaide involved three boys who instigated an attack on another group of boys.
"As I say, the incident really involved three boys approaching another group of boys," Assistant Commissioner Duvall.
"We are not clear on the intention of that at this stage but I stress it does not appear to be a random attack, and it does not appear that the three boys were intending on targeting anyone else in the centre."
Assistant Commissioner Duvall said an altercation then occurred, and some of the boys were armed with expandable batons. There were also reports a knife may have been involved.
The first group of boys chased the other group through the centre, before entering the David Jones store.
"Police responded and by the time police had got to the centre, Westfield Marion had enacted their emergency procedures and they were following their procedures that take place during the information … and we escalated our response to ensure the safety of all patrons in the centre," he said.
The three boys, who were captured on CCTV, were described as being under 18 years of age and of Caucasian appearance.
"At this stage, we know the identity of the two victims. I would say that it is clear from the vision this is not a random attack. The boys would appear to be known to each other," he said.
South Australia Ambulance Paramedics treated two patients – a woman in her 70s with shoulder injury and a person in 30s with a knee injury – who were injured in the evacuation process.
"No-one was injured as a result of the altercation with the boys but I am aware that in the evacuation process we had a female, I believe he was 77, may have fallen and suffered a fracture," he said.
"I also understand there was a young girl around the age of 14 who, again, may have been injured during the evacuation process."
Police will remain at the scene.
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