Columbia, SC (WLTX) - Gas prices in South Carolina saw their steepest one-week drop in four years, AAA Carolinas reports.

The group says a gallon of gas is currently $3.36, down 12 cents from a week ago.

The last time there was a drop that quickly was in late November-early December of 2008.

Overall, gas prices have dropped 27 cents in the state since September 14th; however, the average price is still 11 cents more than at this time last year.

AAA says the drop in gas prices occurred because of a decline in crude oil prices and worries about a possible weakening of the U.S. economy.