Iowans saw a slight rise in gas prices at the pump this past week, while nationally, prices held steady. AAA and the Iowa Department of Agriculture and Land Stewardship reported that the average price of regular unleaded rose 3 cents this week. Iowa gas prices remain 25 cents below the national average. Retail diesel prices also rose in Iowa, increasing by 5 cents. Nationally, diesel prices rose by one cent and crude oil prices fell this week.