Attorney General Roy Cooper has issued 10 additional subpoenas to nine more North Carolina gas stations as part of his investigation into possible price gouging.

The Consumer Protection Division issued the latest round of subpoenas Wednesday. They demand information from gas stations in Buncombe, Craven, Cumberland, Guilford, Iredell, McDowell, Montgomery and Yadkin counties.

The stations reportedly charged consumers at least $5.35 per gallon for gas, just days after Hurricane Ike pounded the Texas coast and its numerous oil refineries. State law prohibits retailers from charging excessive prices in times of crisis.

More than 3,700 complaints of alleged price gouging have been filed with the state since Friday. Cooper had already sent seven subpoenas to owners of 14 other gas stations.