COLUMBUS: The Ohio AAA says gas prices have spiked more than 20 cents per gallon because of regional supply concerns brought on by refinery issues.

The AAA says the price of a gallon of unleaded gas in Ohio started Monday at an average of $3.46 but at many station jumped during the day to an average of $3.69.

The hike was attributed to problems at Chicago-area refineries that bumped up wholesale prices for the entire region. The AAA said Tuesday that prices may continue to rise until the issues are resolved.

Nationally, the average price at the pump has also increased, along with global oil prices.

According to AAA’s Monthly Gas Price Report, the national average gas price increased 17 cents a gallon during July.