Indiana Attorney General Greg Zoeller says the high price of gas in the state is due to refinery problems in the region. Indiana is ranked 7th in the nation for the average price of gasoline at $3.78 per gallon. Zoeller says the recent spike in price stems from the shutdown of one Illinois refinery and the partial closure of three others. The four refineries account for 81-percent of the refining capacity in Indiana and Illinois. The shutdown has spiked gas prices in Michigan, Illinois and Ohio in addition to Indiana. According to gasbuddy.com, the average price of regular unleaded in Washington Thursday was 3.55. It was 3.68 in Vincennes; 3.41 in Petersburg; and 3.58 in Jasper.