The number of Americans filing new claims for jobless benefits rose more than expected last week, with several states reporting an increase related to Tropical Storm Isaac.

In a separate report, a sharp rise in gasoline costs drove up wholesale prices last month by the most in more than three years. But outside energy and food, price gains were mild.

Initial claims for state unemployment benefits rose 15,000 to a seasonally adjusted 382,000, the highest in two months, the Labor Department said on Thursday. The prior week's figure was revised up to show 2,000 more applications than previously reported.