Several anti-smoking groups and doctors have filed a lawsuit challenging the U.S. Food and Drug Administration’s decision to delay its review of e-cigarettes.

The suit, filed Tuesday in a federal court in Maryland, accuses the agency of exceeding its authority and not following proper procedure last year when it pushed back to 2022 the deadline by which e-cigarette makers must submit their products for review. Plaintiffs in the suit argue that the delay harms public health, particularly for young people because it leaves them vulnerable to kid-friendly e-cigarettes and cigars that may lead to a lifetime of tobacco addiction.