The state of California sued Juul Labs Inc., alleging the e-cigarette maker engaged in a “systematic” and “wildly successful” campaign to attract teenagers to the San Francisco company’s nicotine devices.

A Massachusetts judge ruled that a four-month ban on the sale of vaping products the state adopted in response to an outbreak of lung illnesses linked to e-cigarette use was likely “unlawful,” but he gave the state time to fix its defects.

E-cigarette maker Juul Labs Inc. will completely halt U.S. sales of all flavors except tobacco, mint and menthol as the company faces heightened scrutiny from regulators, lawmakers and state attorneys general over the appeal of the company’s nicotine products to teenagers.

A U.S. House panel sent letters to four e-cigarette companies asking them to stop all print, broadcast and digital advertising of their products in the United States.

The number of Americans sickened by a severe vaping-related illness continues to increase, according to a U.S. health official speaking at a Congressional hearing.

San Francisco is the first major city in the United States to ban the sale of e-cigarettes as officials look to control the rapid uptick in teenage use of nicotine devices made by companies such as Juul Labs Inc.

The U.S. Food and Drug Administration warned of potential safety risks from the use of e-cigarettes after the regulatory agency found certain users had suffered from seizures.