Gray Syrian hamster with white belly

I lost my gray Syrian hamster named Nori yesterday around 3pm after I stepped out to grab a snack. Last seen near the Gadsden Public Library on Meighan Boulevard, I think he ducked into the hedge by the steps near the fountain. Nori is tiny, about the size of a ping-pong ball, with fluffy gray fur and a white belly. He also has a distinct white patch on his chest and a tiny notch on his left ear that makes him easy to spot if you find him. He has been with us since last year and I'm really worried; he means a lot to my daughter and me. I'd be grateful to get him back.