Nineteen P.E.I. retailers were issued warnings in March for selling tobacco products to minors.

The names of the stores were posted this week on the province's website. Three retailers — Queen's Arms Esso and Harbourside Convenience in Charlottetown, and Granville Gas and Convenience Centre in Summerside — were warned twice each, all within the month of March. None received a fine.

"Within a short period of time, a few days or a week, we will return and conduct an enforcement check and if the retailer sells again on that enforcement check then we issue the fine," Joe Bradley, manager of environmental health for the province, told CBC News Wednesday.

"There were some instances in this most recent release of information where one retailer in particular had sold on two occasions, but there was an enforcement check between those two instances when they were compliant."

Bradley says if stores continued to receive multiple warnings in a month, the province could issue a fine of $250.