Texas AG Ken Paxton is leading a bilateral, 39-state investigation into Juul's marketing practices.
Attorneys general from Connecticut, Florida, Nevada, Oregon and Texas said they will lead the multi-state investigation into San Francisco-based Juul.
A total of 2,758 people have been hospitalized or have died due to a vaping- and THC-related lung illness.
All vaping manufacturers must submit their vaping products for Food and Drug Administration review by May 12.
Securities regulators have opened a probe related to Altria Group Inc.'s investment in controversial e-cigarette startup Juul Labs Inc.
Vaping product maker Juul Labs is being sued by the state of Massachusetts for allegedly gearing marketing campaigns toward minors, which included the purchase of advertising space on the websites of Nickelodeon, Seventeen magazine and Cartoon Network.
The Pennsylvania attorney general's office sued electronic cigarette manufacturer Juul Labs Inc. on Monday over how its products are marketed and sold to teenagers.
Fruit, candy, mint and dessert flavors from small, cartridge-based e-cigarettes are prohibited, but the partial ban, which took effect Thursday, exempts menthol and tobacco flavors.
Altria posted a fourth-quarter loss of $1.8 billion compared to a profit of $1.3 billion the prior year.
The FTC was expected to make a decision regarding the investment by early January.
2019 has seen the most CEO departures since 2002.
Illinois has become the latest state to sue the country's biggest e-cigarette maker.
Council members could also vote Thursday to ban menthol e-cigarette flavoring.
Minnesota Attorney General Keith Ellison sued Juul Labs.
Massachusetts’ governor signed into law Wednesday a groundbreaking ban on the sale of flavored tobacco and vaping products, including menthol cigarettes.
Tobacco remains the No. 1 cause of preventable death in the U.S.
As of Nov. 20, these deaths have been confirmed in 25 states and the District of Columbia, the Centers for Disease Control and Prevention (CDC) said.
“This nation-leading step will save lives,” Democratic House Speaker Robert DeLeo said.
The American Medical Association on Tuesday called for an immediate ban on all electronic cigarettes and vaping devices.
California officials have accused the company of violating the privacy rights of minors, too.