Police are appealing for information that will assist in the investigation into that assault at the Warwick Post Office earlier this week
Officers would like to speak to anyone who could identify the four men involved in the attack on another young male inside the post office on Monday afternoon.
A police spokesman said the men involved were said to be brown complexioned, wearing dark jackets and black helmets.
Three of the men attacked the 22-year-old inside the post office while the other stood guard outside.
The men are believed to have left the scene on separate motorbikes after the attack.
Anyone with information that could help police should phone Inspector Peter Stableford on 247-1445 or 717-2286 or contact the independent and confidential Crime Stoppers hotline on 800-8477.