Video posted on social media shows shoppers at the Westfield centre in Parramatta standing underneath a bunch of balloons, which contained free gift cards and shopping vouchers.
Once the balloons dropped, shoppers rushed to grab them, causing a stampede.
Australian broadcaster ABC said some shoppers had chest, neck, leg and back injuries.
A witness who works in the shopping centre described what happened as "mayhem".
"All I know was that people were getting crushed", she added.
The owner of the Westfield shopping centre says it is investigating the incident.
• Subscribe to ITV News on YouTube:
• Get breaking news and more stories at
Follow ITV News on Facebook:
Follow ITV News on Twitter:
Follow ITV News on Instagram:
0 Comments