The Sioux Falls police did a compliance check on 16 off-sale alcohol establishments within city limits Thursday.
Of the 16 checks, only the Gas Stop at 4600 w. 41st Street made a sale to a person under 21.
The clerk received a citation and will have to appear in court. The business may also face fines and punishment.
Sioux Falls police say they plan to continue doing random liquor stings.