(AP) — A state official says divers will explore an apparent shipwreck in Lake Michigan discovered by two treasure hunters who say it may be the long-lost Griffin, which disappeared more than three centuries ago. State maritime archaeologist Wayne Lusardi tells television station WZZM (http://on.wzzm.com/1zUr3zQ ) he doesn't think the men found the wreckage of the Griffin, which was commanded by the French explorer La Salle.