Seven out of 50 businesses sold alcohol to minors Friday night during a sting operation in Cochise County.

The businesses were chosen based on previous liquor violations, complaints from citizens and other factors, according to a news release from the Sierra Vista Police Department.

The operation was conducted by the Southeastern Arizona DUI Task Force.

In addition to 16 officers from the Sierra Vista Police Department and Cochise County Sheriff Office, 10 teens between the ages of 16 and 19 volunteered for the Covert Underage Buying operation, according to the police department. The teens carried their own state-issued IDs clearly indicating they were under 21 years old.

The seven businesses cited for selling alcohol to minors were: Fry’s Food Store and Shell Gas Station, both located in Sierra Vista; Western Junction Bar & Grill, located in McNeal; Ray’s Restaurant and Sunset Saloon, located in Huachuca City; Loves and Arena Bar, both located in Benson, according to the police department.

Four businesses that sold alcohol to minors during the June operation did not sell this time.