RICHMOND, Va. (AP) — The U.S. government is asking a federal appeals court to rehear a challenge to a Food and Drug Administration requirement that tobacco companies put large graphic health warnings on cigarette packages to show that smoking can disfigure and even kill people.

The Justice Department filed a petition Tuesday asking for the full court to rehear the case after a three-judge panel of the U.S. Court of Appeals in Washington affirmed in August a lower court ruling blocking the mandate, saying it ran afoul of the First Amendment's free speech protections. However, the court rarely grants such appeals.

Some of the nation's largest tobacco companies, including R.J. Reynolds Tobacco Co., sued to block the mandate to include warnings to show the dangers of smoking and encouraging smokers to quit lighting up. They argued that the proposed warnings went beyond factual information into anti-smoking advocacy. The government argued the photos of dead and diseased smokers are factual.

The nine graphic warnings proposed by the FDA include color images of a man exhaling cigarette smoke through a tracheotomy hole in his throat, and a plume of cigarette smoke enveloping an infant receiving a mother's kiss. These are accompanied by language that says smoking causes cancer and can harm fetuses. The warnings were to cover the entire top half of cigarette packs, front and back, and include the phone number for a stop-smoking hotline, 1-800-QUIT-NOW.

This file combination photo made from file images provided by the U.S. Food and Drug Administration shows two of nine cigarette warning labels from the FDA. (AP Photo/U.S. Food and Drug Administration, File)

Tobacco companies increasingly rely on their packaging to build brand loyalty and grab consumers -- one of the few advertising levers left to them after the government curbed their presence in magazines, billboards and TV.

In a 2-1 decision, the appeals court panel wrote that the case raises "novel questions about the scope of the government's authority to force the manufacturer of a product to go beyond making purely factual and accurate commercial disclosures and undermine its own economic interest -- in this case, by making 'every single pack of cigarettes in the country (a) mini billboard' for the government's anti-smoking message."

The court also wrote that the FDA "has not provided a shred of evidence" showing that the warnings will "directly advance" its interest in reducing the number of Americans who smoke.

But in its appeal seeking a full court rehearing, the government argued that the text of the new warnings are "indisputably accurate" and the format, including the use of graphics, is tailored to the demand of a "market in which the vast majority of users become addicted to a lethal product before age 18."

It also argued that the First Amendment does not require the government to show how one part of a multi-faceted anti-smoking public health campaign directly reduces smoking rates.

Warning labels first appeared on U.S. cigarette packs in 1965, and current warning labels that feature a small box with text were put on cigarette packs in the mid-1980s. Changes to more graphic warning labels that feature color images of the negative effects of tobacco use were mandated in a law passed in 2009 that, for the first time, gave the federal government authority to regulate tobacco.

The share of Americans who smoke has fallen dramatically since 1970, from nearly 40% to about 20%. But the rate has stalled since about 2004, with about 46 million adults in the U.S. smoking cigarettes. It's unclear why it hasn't budged, but some experts have cited tobacco company discount coupons on cigarettes and lack of funding for programs to discourage smoking or to help smokers quit.

In recent years, more than 40 countries or jurisdictions have introduced labels similar to those created by the FDA. The World Health Organization said in a survey done in countries with graphic labels that a majority of smokers noticed the warnings and more than 25% said the warnings led them to consider quitting.

Joining North Carolina-based R.J. Reynolds, owned by Reynolds American (RAI), and Lorillard Tobacco, owned by Lorillard (LO.DL), in the lawsuit are Commonwealth Brands, Liggett Group LLC, and Santa Fe Natural Tobacco Co.

Richmond, Va.-based Altria Group (MO 0.70%), parent company of the nation's largest cigarette maker, Philip Morris USA, which makes the top-selling Marlboro brand, is not a part of the lawsuit.

The case is separate from a lawsuit by several of the same tobacco companies over the 2009 Family Smoking Prevention and Tobacco Control Act, which cleared the way for the more graphic warning labels and other marketing restrictions. The law also allowed the FDA to limit nicotine and banned tobacco companies from sponsoring athletic or social events or giving away free samples or branded merchandise.

In March, a federal appeals court in Cincinnati ruled that the law was constitutional. The contradiction of the decisions could mean the case would be settled by the U.S. Supreme Court.