Sydney jewellery store held up at gunpoint

A gun-wielding bandit has held up a jewellery shop in Sydney's inner-city.

Police said the armed man stormed into the shop in Jones Street, Ultimo, about 5pm (AEDT) on Friday.

The robber threatened an employee then removed money and jewellery from a safe, before fleeing.

Police say he's about 180cm tall, has an average build, and was wearing a dark hoodie.