A group of Democratic senators have called on the Federal Trade Commission to investigate the marketing practices of electronic cigarettes, suggesting the industry may be targeting their products to children and teens.

The senators — Barbara Boxer of California, Richard Blumenthal of Connecticut, Dick Durbin of Illinois, Tom Harkin of Iowa, Sherrod Brown of Ohio and Edward Markey of Massachusetts — also asked the FTC to pursue enforcement action against companies that make false or misleading health claims in their advertising.