Man makes citizen's arrest in Melbourne

A man has knocked a gun out of a woman's hand during an attempted armed robbery at a Melbourne convenience store.

Police allege the woman entered the Albert Park store on Saturday afternoon wearing a motorcycle helmet and carrying a black imitation handgun, and threatened a shop attendant to hand over cash from the till.

A 57-year-old customer tackled the woman, knocking the firearm for her hand and restrained her until police arrived and arrested her.

The 35-year-old Mildura woman has been charged with attempted armed robbery, aggravated burglary and firearms offences.

She was remanded in custody to appear at the Melbourne Magistrates Court on Sunday.