The Food and Drug Administration says Walgreens sells more tobacco products to minors than any other pharmacy chain. Now the agency wants to meet with the company to discuss its tobacco and e-cigarette sales policies.

FDA inspectors have found nearly 1,800 cases since 2010 where Walgreens stores violated the law and illegally sold tobacco products to minors, according to a letter FDA Commissioner Scott Gottlieb wrote Monday to Richard Ashworth, Walgreens’ president of operations. Gottlieb said the company is the “top violator” among pharmacy chains that sell such products. 22% of the more than 6,000 Walgreens stores the FDA inspected made illegal sales.