Dwarf hamster with gray fur and white belly

I lost my dwarf hamster, Niko, yesterday around 3pm near the Morgantown Public Library on High Street. He has gray fur with a white belly and a tiny black dot on his left ear. He's about the size of a ping-pong ball and moves fast when frightened. This little guy is a gift from my sister and means the world to me; I'm really worried I'll never see him again. If you found him, a message here would help us arrange pickup in Morgantown.