Police are at the scene of an aggravated robbery at BP on the Run, Edwardstown.

At about 9.55am, a man entered the Daws Road store armed with a knife, threatened staff and demanded money.

The suspect fled the store with an amount of money and was chased by a member of the public.

The suspect was last seen running south on Henden Street.

Dog Operations are on their way to assist with the search.

The suspect is described as a man of Caucasian appearance, about 170cm tall, slim build, and he was wearing a white hooded jumper, black tracksuit pants and a mask covering part of his face.

Police are investigating possible links to another aggravated robbery which occurred in the early hours of the morning at a BP on the Run in St Marys.

– See more at: http://www.sapolicenews.com.au/more-news/23527-aggravated-robbery-edwardstown.html#sthash.kGnSDHJG.dpuf