Duo rob store, bash man with tree branch

Two criminals have used a tree branch to rob a store and assault its attendant in Beverley Hills, in Sydney's south.

It is alleged the two men entered the store on Tuesday evening and assaulted the 19-year-old attendant and his parents, who came to his aid, with the branch before fleeing with cash.

The alleged criminals are described as being of Pacific Islander appearance and in their mid 20s.