Lost black leather shoulder bag with silver accents and detachable strap near Riverfront Park, Mankato.

I lost my black leather shoulder bag, which has silver accents and a detachable strap, while walking near the Riverfront park in Mankato. I last remember having it while sitting on a bench, enjoying the view, but when I got up to leave, it must have slipped behind me. Inside were some personal items including my wallet and keys. If anyone has seen it, I would really appreciate a message!