McCain Foods USA, Inc. announced an expansion of its voluntary recall of frozen hash brown products Wednesday, over concerns that they may be contaminated with golf ball materials, “hard plastic or rubber pieces,” in particular.

According to the recall issued on the Food and Drug Administration’s website, the company said: “despite our stringent supply standards may have been inadvertently harvested with potatoes used to make this product.”

Read: Frito-Lay, Hunt’s And More Pull Product Over Salmonella Contamination In The Past Year

The recall, which only includes products produced and sold within the United States, was expanded after the company received two additional consumer complaints of the hard plastic or rubber pieces after the original recall that was announced last week.

The complete list of products affected can be seen below:

1. Roundy’s Brand 2 lb. Bag of Frozen Southern Style Hash Browns (distributed after Jan. 19 with production code B170119)

2. Harris Teeter Brand 2 lb. Bag of Frozen Southern Style Hash Browns (distributed after Jan. 19 with production code B170119)

3. Wegman’s Brand 28-ounce bag of frozen O’Brien Hash Browns (distributed after Oct. 21, 2017 with production code B161021)

While the first two were a part of the initial recall, the Wegman’s product that was distributed in the states of Maryland, Massachusetts, New Jersey, New York, Pennsylvania and Virginia, is the latest addition to the list.

The company said in the statement: “Food safety remains a top priority for McCain Foods USA, Inc. and we have full confidence that all appropriate steps are being taken to protect our consumers.” 

The company urged people who have purchased the products not to consume them and asked for the affect products to be thrown away or returned to the stores that they were purchased from.

All questions or concerns about the recall and the products affected may be directed to McCain Foods USA, Inc. at 630- 857-4533 or 630-857-4423, from Monday to Friday, between 9 a.m. and 6 p.m. EDT.