ZURICH (Reuters) – U.S. authorities should show restraint in a crackdown on banks accused of helping rich Americans dodge taxes, while indicting another bank could risk significant collateral damage, the head of a Swiss-American business lobby group said on Monday.

The comments by Martin Naville, head of the Swiss-American Chamber of Commerce, came after the United States indicted Wegelin, the oldest Swiss private bank, last week on charges it enabled Americans to evade taxes.