Steve Bruski, 22, of Albany Park fills up his car at a Mobil Station at the corner of Fullerton Ave. and Seminary Ave. in Chicago, March 7, 2011. (Heather Charles/Chicago Tribune)

Gas prices across Illinois and Indiana continued to climb in April from continuing unrest in the Middle East and the annual switchover to a more expensive summer blend of gasoline, according to AAA Chicago. It marked the first time the monthly average has been above $4 a gallon since July 2008.

Monthly average prices in Illinois and northern Indiana reached $4.02 and $3.90 respectively, AAA said this morning in its Fuel Gauge Report. In Illinois, regular unleaded gasoline has increased 39 cents during the past month and per-gallon prices are $1.02 higher than last year. Get the full story »