Federal agents have seized a number of documents from the manufacturer of a popular e-cigarette device, one that officials say is being used more and more by children.

FOX's Eben Brown reports:

Thousands of documents were taken by agents of the Food and Drug Administration from the offices of Juul Labs, makers of the Juul Electronic Cigarette.

Federal health officials say the popular e-cigarette is being used widely by minors and the makers might be deliberately marketing the devices to children. Juul's executives tell reporters they've previously cooperated with all federal requests.

Federal agencies like the FDA and the CDC have been issuing public warnings about underage e-cigarette use, often naming Juul products.

Eben Brown, FOX News.

Follow Eben Brown on Twitter: @FOXEbenBrown