Barron County authorities are holding two home invasion suspects and looking for two more.  Zach Schwanke and Ricky Gjerseth, both 17, are in the Barron County Jail facing robbery charges.  The Barron County Sheriff’s Office reports 17-year-old Tyler Rognholt and 20-year-old Jonah Blake are considered suspects in the two robberies.  Investigators from Rice Lake, Barron and Chetek police are working the case with the Barron County Sheriff’s Office.  Rognholt and Blake were arrested in Eau Claire.