A worker has fought off a gun-wielding robber with a milk crate as he attempted to steal from a Logan fast food joint.

The man entered the Tanah Merah Chinese takeaway shop, on Tansey Drive, about 7.40pm armed with what police said appeared to be a handgun.

A woman hit an armed robber on the arm with a milk crate. Credit:Jim Rice

But when he demanded money from the attendant and leaned forward to the cash register the woman hit him on the arm with a milk crate.

The would-be robber fled when she called out for help and a man working in the restaurant rushed to her aid. No money was taken and no one was hurt.