UPDATE, 5:19 a.m. EST Thursday: Aaron Feis, an assistant football coach and security guard at Marjory Stoneman Douglas High School in Parkland, Florida, has died after being wounded in a deadly mass shooting Wednesday, the team tweeted early Thursday.

“It is with great sadness that our football family has learned about the death of Aaron Feis,” the team wrote. “He was our assistant football coach and security guard. He selflessly shielded students from the shooter when he was shot. He died a hero and he will forever be in our hearts and memories.”

ORIGINAL STORY: An assistant football coach reportedly was shot while protecting students during a deadly mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida.

Aaron Feis is being celebrated as a hero, according to the Miami Herald, citing tributes to the coach and reports on social media.

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Seventeen were killed and many more were injured in Wednesday's shooting. A gunman, whom police identified as 19-year-old former student Nikolas De Jesus Cruz, opened fire on students in the afternoon.

When the shooting started, Feis – a school security guard, as well – reportedly stepped between the shooter and students, taking bullets in the act. He was reportedly hospitalized in critical condition.

Douglas football player Charlie Rothkopf tweeted that his coach “took [several] bullets covering other students at Douglas.”

The Miami Herald reported that Feis is a 1999 graduate of Marjory Stoneman Douglas High School.

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"He is a friend to all students that know him," wrote Angelica Losada, who identified herself as a former student at the school. "Please, take a moment to send healing prayers for him."

Broward County Sheriff Scott Israel said "a football coach" had died in the shooting. It is not clear if Israel was referring to Feis.