ST. PETER-August 31, 2012-(KMKO)-As Labor Day weekend gets underway, The Nicollet County Sheriff's Office and the St. Peter Police Department are reminding underage college and high school students to stay safe, responsible and sober.  Many parties will be held this weekend as students return to campus.  Extra law enforcement will be on the job this weekend, watching out for impaired drivers and underage alcohol use.  Those who purchase alcohol for minors will be prosecuted as well.