Valparaiso Police say a convenience store was held-up Wednesday evening by an individual they believe is involved in three other armed robberies over the past few weeks. Officers responded to the Save Gas Station in the 900 block of Roosevelt Road around 6 pm, where the subject had entered the store, approached the clerk, displayed a semi-automatic handgun and demanded cash. The suspect is described as male, approximately 5’8”, 160 lbs with a dark complexion, and has worn the same clothing in each instance, a dark colored hooded sweatshirt with a diamond or star type of print on it, with dark colored pants and white shoes. He also wears a mask and gloves. Buz's Liquor Store on East Lincolnway was robbed just after midnight this past Sunday, and the Quick Trip Convenience Store/Chesters Fried Chicken was held-up twice within a week-and-a-half in late November. Anyone with information is asked to call “We Tip at 1-800-78-Crime. There is a reward available. Individuals can also contact police anonymously by sending a tip to TIP411, (847-411) and enter the keyword “Valpo” prior to sending a message.