(Hanska, MN) —  Authorities in south central Minnesota are warning of unsafe ice conditions in the area.  The Brown County Sheriff’s Office says a pickup truck broke through the ice on Lake Hanska on Saturday afternoon near the main landing off County Road 6.  Deputies say no one was injured and the truck had to be removed from the water.  Many lakes and rivers in Brown County currently have thin ice conditions and officials are asking folks to refrain from driving on the ice.