Police are investigating an armed hold-up at a Port Road, Welland service station overnight.
The man made off with cash, cigarettes and milk. A police dog later managed to track the suspect on foot for a few blocks to where he may have had a car waiting.
The service station attendant was not injured during the robbery.
The suspect is described as a man aged in his mid-20s, of Caucasian appearance, 183cm tall, with a fair complexion and a thin face. He was wearing a black or charcoal hoody with a shiny appearance, black track pants and carried a grey sports bag.