Follow CBSMIAMI.COM: Facebook | Twitter

OLYMPIA, Wash. (CBSMiami/AP) — Pistachios sold in brands of Trader Joe’s, Wonderful, and Paramount Farms are being recalled nationwide over issues they may have salmonella.

Health officials in nine states are investigating 11 cases of salmonella linked to pistachios from Wonderful Pistachios of Lost Hills, California. The nuts are sold nationwide and in Canada.

The recalled pistachios can be identified by a lot code number on the lower back or bottom panel of the package. A list of those numbers is available on the website of the Centers for Disease Control and Prevention.

Wonderful Pistachios says on its website that it takes food safety seriously and is working with health officials to find the source of the problem.

The company asks people to return the nuts where they bought them for a refund.

(TM and © Copyright 2016 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2016 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)