Police are investigating after a man stolen cash and cigarettes from a service station yesterday evening.

Just before 9pm on Friday 17 February, police were called to Martins Road at Parafield Gardens after a man entered the store armed with a knife and wearing a clown mask.  He threatened the staff member and demanded the cash til be opened.

The suspect grabbed cash from the til and handed the victim a bag demanding cigarettes be placed inside.

The suspect left the store with the stolen cash and cigarettes and was last seen possibly riding a postie style motorbike heading north-east on Martins Road towards Kings Road.

The man is described as being about 183cm tall, with a slim build.  He was wearing a clown mask, black hooded jumper, navy blue Adidas tracksuit pants, red shoes and he was carrying a black backpack.

Anyone with information that may assist with the investigation is asked to contact Crime Stoppers on 1800 333 000 or online at www.crimestopperssa.com.au – you can remain anonymous.