Masked thieves steal $700k worth of jewellery from car in South Yarra

Armed thieves wearing black balaclavas have stolen $700,000 worth of white gold and diamonds in an armed robbery in Melbourne.

Two men were sitting in a car on Avoca Street, in South Yarra, with two backpacks containing the jewels sitting on the back seat.

Two armed men approached the car, smashed the window and fled with the backpacks in a blue Ford sedan.

Detectives from the Stonnington Crime Investigation Unit are appealing for witnesses, and anyone with information should call Crime Stoppers.