Police were called to the shopping centre in western Sydney just after midnight after reports a number of people had been hurt in a crowd rush, a NSW Police spokesperson confirmed to news.com.au.
At least three people were treated at the scene for minor injuries and taken to Westmead Hospital for further treatment.
There are unconfirmed reports as many as seven people were hurt.
It is understood 100 to 150 shoppers had gathered below the balloon-drop event held to kick off a 36-hour non-stop shopping spree leading up to Christmas. The balloons were filled with Westfield gift cards, retailer discounts and prizes, according to the Westfield Parramatta website, “to help you shop till you drop all night long.”
“Once the balloons were released the crowd rushed towards them, causing people to get knocked over and some of them injured,” the police spokesperson said.
Paramedics could be seen wheeling the injured out of the shopping centre shortly after midnight.
There will be no ongoing police investigation.