He required hospital treatment for his injuries.
The men allegedly took a white Samsung Galaxy cellphone, a Cannon DSLR camera, a black wallet with a Z shape on the front, a light grey zip-up bag with Todd written on it, a white Apple iPhone 4 and a black leather wallet.
Police are looking for the men responsible.
One is described as a Maori man in his mid to late 20s.
He was wearing a red hat, red T-shirt with white diamond patterns all over it and brown pants.
The man had stubble and was wearing a fingerless glove on his right hand.
The second man was also described as Maori in his mid to late 20 and wearing green pants.
He had dyed blond hair tied up in a ponytail.
The third man was also a Maori in his mid-to-late 20s.
If you have any information, please phone Constable Honeyfield on 06 831 0700.