Rising energy prices are putting a damper on the slowing inflation narrative as wholesale costs rose 0.6% in February, double the expectation, the Bureau of Labor Statistics reported on Thursday.

On an annual basis, the producer price index increased by 1.6%, well above the 1.2% forecast and the largest year-over-year gain since September.

“Nearly 70 percent of the broad-based rise in February can be attributed to the index for final demand energy, which jumped 4.4 percent,” the release said.

Wholesale inflation rose at double its expected rate in February, according to a government report released Thursday, the second report this week that could indicate a lack of progress on tempering inflation.

The Producer Price Index (PPI), which tracks the cost of materials that producers and manufacturers buy from their suppliers, rose by 0.6 percent last month compared with January, a report from the Bureau of Labor Statistics said. That surge is double the expected 0.3 percent that Dow Jones forecasted.

Wholesale prices accelerated at a faster-than-expected pace in February, another reminder that inflation remains a troublesome issue for the U.S. economy.

The producer price index, which measures pipeline costs for raw, intermediate and finished goods, jumped 0.6% on the month, the Labor Department’s Bureau of Labor Statistics reported Thursday. That was higher than the 0.3% forecast from Dow Jones and comes after a 0.3% increase in January.