The Food and Drug Administration plans to crack down on e-cigarette products that target kids with candy and fruit flavors after finding that vaping among middle-schoolers and high-school students has soared in the past year, according to a published report.

FDA Commissioner Scott Gottlieb will likely announce a ban on the sale of flavored e-cigarettes in convenience stores and gas stations as early as next week, the Washington Post reported. Strict age verification rules are also likely.

As many as 3.5 million teenagers were vaping as of the beginning of the year thanks to a 70% increase among high schoolers and a 50% increase among middle schoolers from the previous year, according to government data.

About 70% of the market for the flavored products is controlled by San Francisco based Juul Labs, which is privately held.

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