The Sarnia Police Service is investigating a robbery that took place on March 25, 2017 at approximately 1:45 am. A convenience store located on Exmouth Street, in the City of Sarnia, was robbed at knife point by a female suspect. She is believed to be 5 foot, 6 inches tall, thin build and approximately 25 to 30 years of age. She was wearing a black hooded jacket, black pants, black shoes and heavy silver eye shadow. The suspect made off with a quantity of cash, cigarettes and lottery tickets. Please find photos attached below. If you have any information regarding this robbery you are please asked to contact Detective Constable Sean Peters at 519-344-8861, extension 6197, or Sarnia Lambton Crime Stoppers at 1-800-222-8477.