Two Perth businesses were robbed at knifepoint in separate incidents in Perth last night.
At 10.30pm a man with a large knife demanded money from a service station in Locke Lane, Ellenbrook.
He was in his mid twenties, fair skinned, about 183cms tall and wearing a light-coloured hooded top.
At 10.25pm two men armed with knives demanded money from staff at a fast food outlet on Walter Road East in Morley.
Both men were of medium build with an olive complexion and about 175cms tall.
Both were wearing dark clothing.
Police believe they were driving a small sedan, possibly silver in colour.
Anyone with information on either robbery can call Crime Stoppers on 1800 333 000.