Man robbed and threatened with pipe

A man has been robbed and threatened with a sharpened piece of PVC pipe in Sydney's south.

The 24-year-old was walking along a road in Hurstville yesterday afternoon, when a man allegedly grabbed him around the neck before taking his wallet and phone from his back pocket.

He was then forced to withdraw money from a nearby ATM, before returning home where the man allegedly threatened the victim's flatmate before demanding more cash.

He fled the scene and remains at large.