(CNN) — At least three shootings across Mississippi this weekend, all apparently connected to high school football games, left several people dead, including an expectant mother, and others injured.

Four people were killed and at least 12 others were injured in a shooting in the northwestern Mississippi city of Leland late Friday or early Saturday, the city’s mayor said.

Mayor John Lee told CNN that 16 people were shot and four were killed near downtown Leland around midnight. Lee did not clarify whether he counted the four dead among the 16.

No one was in custody in connection with the shooting, he said. An investigation is underway, the Leland Police Department told CNN when asked about reports of a shooting. It did not release further information.

The shooting happened during a g

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