"Sample analyses show a very low proportion" of pork meat, or less than 0.1 percent, the Swiss Central Islamic Council (CCIS) said in a statement.
Islamic tradition forbids the consumption of pork.
The group said it believed the traces of pork were the unintentional result of gaps in the production process, saying equipment used to handle the meat may have also been used to manufacture the kebabs.
CCIS staff said they were "shocked" by the discovery deriving from random tests carried out in Basel, Biel, Geneva, Kreuzlingen, Lausanne, Lucerne, Winterhur and Zurich.
The organization ordered the test sampling after being "alarmed by the scandal that recently erupted in Germany where seven percent of pork meat was found in meat for kebabs."
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