The Food and Drug Administration seized "thousands of pages of documents" in a surprise inspection of e-cigarette maker Juul's San Francisco headquarters last week, the agency said Tuesday.
The FDA is looking into the company's marketing practices as Commissioner Scott Gottlieb calls teen use of nicotine vaping devices an "epidemic."
It builds on the agency's request in April for company materials related to how Juul products appeal to kids. The most recent inspection, conducted Friday, "sought further documentation related to Juul's sales and marketing practices, among other things," the FDA said in a statement.
Juul CEO Kevin Burns said the company walked the FDA through "every part" of its business, including its marketing practices and age-verification tools used on its online shop.
"It was a constructive and transparent dialogue," Burns said in a statement.