The Food and Drug Administration announced Monday that it will act to ensure the government's right to impose marketing, manufacturing and safety restrictions on "electronic cigarettes," a nicotine delivery device widely billed as an alternative to cigarettes for those trying to quit and for smokers who can't light up.

In a letter posted to the FDA's website Monday, Dr. Lawrence R. Deyton, director of the FDA's Center for Tobacco Products, said the agency will act to regulate e-cigarettes as tobacco products. To shore up its authority to do so, the agency will propose new regulatory language that would specifically define e-cigarettes as a tobacco product.