ORO-MEDONTE TWP. - Police are looking for a woman following an attempted armed robbery at a gas station Saturday night. At 9:40 p.m., Barrie OPP were told a woman entered a store on Highway 12, near Horseshoe Valley Road, pointed a knife at the clerk and demanded money. But when the clerk's husband approached, the woman fled, police said. She left in a dark grey Chevrolet Avalanche pickup truck, OPP said, which police later determined had been stolen in Barrie.