Walgreens Boots Alliance (WBA) - Get Report shares were down 2.5% Monday after the company was named as one of 15 retailers "on notice" by the U.S. Food and Drug Administration for allegedly selling tobacco products to minors. 

Walmart, (WMT) - Get Report , Kroger (KR) - Get Report , 7-Eleven, Family Dollar, BP (BP) - Get Report , and Citgo were the other retailers included in the FDA's report. 

"Retailers are on the frontlines of these efforts to reduce the health consequences of tobacco use and nicotine dependence," Scott Gottlieb said in a statement Monday. "Walgreens, and other retail chains, should take seriously not only their legal obligations, but also the substantial public health importance of preventing tobacco product sales to minors at their stores."

The agency said that 22% of Walgreens locations inspected by the agency caught employees illegally selling tobacco products to minors. 

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The FDA said that it is also targeting more than 40 companies who may have illegally introduced e-cigarettes onto the market without first getting permission from the agency. 

"If tobacco products are being unlawfully marketed and sold outside the FDA's compliance policy, we'll take action," Gottleib said. "We simply cannot tolerate this behavior and will take additional action as needed."

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