The incident took place at the 33,000 capacity Ladd-Peebles Stadium in the city of Mobile.
According to police two suspects have been detained and ten people injured.
Video from the scene shows large numbers of police cars parked outside the stadium with their sirens turned on.
The shooting took place following a high school American football game between Williamson and LeFlore.
Witnesses reported hearing shots fired following “a fight in the stands”.
According to police the injured are all aged between 15 and 18.
Lenise Ligon, a local reporter from Fox 10 News, claimed police are attempting to identify the injured.
On Twitter she posted: “Police chief says it’s unacceptable for people to not be able to come out and watch their children perform.
“Police are trying to identify the victims – taken to multiple hospitals.”
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