NEW YORK — Cigarettes would have to be kept out of sight in New York City stores under a first-in-the-nation plan unveiled by Mayor Michael Bloomberg on Monday, igniting complaints from retailers and smokers who said they've had enough with the city's crackdowns.

Shops from corner stores to supermarkets would have to keep tobacco products in cabinets, drawers, under the counter, behind a curtain or in other concealed spots. Officials also want to stop shops from taking cigarette coupons and honoring discounts, and are proposing a minimum price for cigarettes, below what the going rate is in much of the city now, to discourage black market sales.

Anti-smoking advocates and health experts hailed the proposals as a bold effort to take on a habit that remains the leading preventable cause of death in a city that already has helped impose the highest cigarette taxes in the country, barred smoking in restaurants, bars, parks and beaches and launched sometimes graphic advertising campaigns about the effects of smoking.

The ban on displaying cigarettes follows similar laws in Iceland, Canada, England and Ireland, but it would be the first such measure in the U.S. It's aimed at discouraging young people from smoking.

"Such displays suggest that smoking is a normal activity," Bloomberg said. "And they invite young people to experiment with tobacco."

But smokers and cigarette sellers said the measure was overreaching.

"I don't disagree that smoking itself is risky, but it's a legal product," said Audrey Silk, who's affiliated with a smokers-rights group that has sued the city over previous regulations. "Tobacco's been normal for centuries. ... It's what he's doing that's not normal."

Slated to be introduced to the City Council on Wednesday, the anti-smoking proposal was also a sign that a mayor who has built a reputation as a public health crusader isn't backing off after a setback last week, when a judge struck down the city's effort to ban supersized, sugary drinks. The city is appealing that decision.

"We're doing these health things to save lives," Bloomberg said Monday.

The billionaire mayor, who also has given $600 million of his own money to anti-smoking efforts around the world, began taking on tobacco use shortly after he became mayor in 2002. Adult smoking rates have since fallen by nearly a third — from 21.5 percent in 2002 to 14.8 percent in 2011, Health Commissioner Dr. Thomas Farley said.

But the youth rate has remained flat, at 8.5 percent, since 2007. Some 28,000 city public high school students tried smoking for the first time in 2011, city officials say.

Keeping cigarettes under wraps could help change that, anti-smoking advocates say. Moreover, it could cut down on impulse buys by smokers who are trying to quit, city officials say.

While some of the research focuses on cigarette advertising, an English study of 11-to-15-year-olds published last month in the journal Tobacco Control found that simply noticing tobacco products on display every time a youth visited a shop raised the odds he or she would at least try smoking by threefold, compared to peers who never noticed the products.

The American Cancer Society Cancer Action Network, the American Lung Association, other anti-smoking groups and several City Council members applauded Bloomberg's announcement, made at a Queens hospital. City Council Speaker Christine Quinn, who largely controls what goes to a vote, said through her office that she "supports the goal of these bills" but noted they would get a full review.

Some convenience store owners fear the measure could affect their business, by potentially leaving customers uncertain whether the shop carries their favorite brand and making them wait while a proprietor digs out a pack, said Jeff Lenard, a spokesman for the National Association of Convenience stores.

"It slows down the transaction, and our name is convenience stores," he said.

Jay Kim, who owns a Manhattan deli on 34th Street, saw the proposal as a bid to net fines.

"I know the city wants to collect money," he said at his store, where packs of cigarettes can be seen behind the counter, along with numerous signs warning of the dangers of smoking and prohibiting sales to minors.

The displays would be checked as part of the shops' normal city inspections; information on the potential penalties wasn't immediately available Monday night. Repeated violations of some of the other provisions, including the minimum-price and coupon ban, could get a store shuttered.

Stores that make more than half their revenue from tobacco products would be exempt from the display ban. Customers under 18, the legal age for buying cigarettes in New York, are barred from such stores without parents.

New York City smokers already face some of the highest cigarette prices in the country. Including taxes, it's not uncommon for a pack to cost $13 or more in Manhattan. The proposed minimum price, also including taxes, is $10.50.

Other public health measures Bloomberg has championed include pressuring restaurants to use less salt and add calorie counts to menus, and banning artificial trans fats from restaurant meals.

Jennifer Bailey, smoking as she waited for a bus on 34th Street, was no fan of the proposed tobacco restrictions or Bloomberg's other public health initiatives.

"It's like New York has become a ... dictatorship," she said.