DULUTH, Minn. (AP) – An increase in bear activity has caused officials to close part of a national park in northwestern Wisconsin.        Sand Island, one of the Apostle Islands, was closed to overnight camping on Monday because of bears entering campsites and finding human food. Park employees thought a temporary halt on camping would reduce food and bear activity.  But Apostle Islands National Lakeshore Superintendent Bob Krumenaker says a bear repeatedly entered a beached boat looking for food Wednesday, so officials closed the island to all visitors later that day.  Krumenaker tells the Duluth News Tribune (http://bit.ly/124IIUG) he isn’t sure how long the island will be closed, but the situation will be re-evaluated frequently.

—      Information from: Duluth News Tribune, http://www.duluthnewstribune.com