Two California produce shippers have recalled thousands of cases of green onions supplied by an onion farm in Mexicali, Mexico, over fears the onions could be contaminated with salmonella.

U.S. Department of Agriculture inspectors found salmonella in a routine test taken in New York last month. No illnesses have been reported.

Officials notified the shipper, Salinas-based Steinbeck Country Produce. The company issued a voluntary recall Aug. 28 for 3,360 cartons.

Steinbeck's produce was distributed in California, Massachusetts, Texas, Indiana, New York, Michigan, Missouri, Kansas and Arizona.

Castroville-based shipper Ocean Mist Farms recalled 1,746 cases as well, after realizing they came from the same lot. Ocean Mist wouldn't say where it's onions were distributed.