Frozen blueberries recalled over listeria risk. See affected states.

More than 55,000 pounds of frozen blueberries sold across four states are being recalled due to potential listeria contamination.

Salem-based Oregon Potato Company (OPC) recalled about 55,689 pounds of individually quick frozen blueberries over risk of listeria monocytogenes contamination, according to an enforcement recall notice posted to the U.S. Food & Drug Administration's website. While the recall was initiated Feb. 12, it was classified as a Class I recall on Feb. 24, which indicates a reasonable probability of causing serious illness or death.

A news release was not issued with the recall. OPC did not immediately respond to USA TODAY's request for comment on the recall.

Here's what to know about the frozen blueberries recall.

The recalled frozen blueberries were packaged in 30-pound corrugated cases with polyethylene liners and 1,400-pound totes.