UNDATED (KDAL) - Gas prices have gone up about 25 cents a gallon over the last couple days in the Twin Ports.  According to MinnesotaGasPrices.com, most stations in Duluth are now up to 3.25 a gallon for unleaded regular after charging under 3 dollars about a week ago.  In Superior most stations have gone up to 3.27.  The average price in Minnesota is 3.16 and the nationwide average is 3.26.