SILVER SPRING, Md. (AP) — Government advisers dealt a blow Thursday to Philip Morris International's hopes to sell its heat-not-burn device in the United States as a less-harmful alternative to cigarettes.

The penlike device heats Marlboro-branded sticks of tobacco but stops short of burning them. It is already sold in more than 30 countries and Philip Morris aims to make it the first "reduced risk" tobacco product ever sanctioned by the U.S.

The votes Thursday by the panel of Food and Drug Administration advisers on the marketing of the iQOS device are nonbinding. The FDA will make a separate...