Police today issued a fresh appeal for information on an assault in a post office.A spokesman said officers wanted to speak to anyone who could identify the four men involved in the attack on another in Warwick Post Office on Monday afternoon.He added that the men were said to be brown complexioned and wearing dark jackets and black helmets.Three of the men attacked the 22-year-old inside the post office and the other stood guard outside.The men are believed to have left the scene on separate motorbikes after the attack on the 22-year-old.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.