The U.S. Army is awarding the Medal of Heroism to three students who died when a gunman opened fire at their Florida high school.

The medals are being given to three Junior Reserve Officers' Training Corps cadets who attended Marjory Stoneman Douglas High School in Parkland, Fla., The Daily Beast reported.

The medal was given to Alaina Petty's family at a memorial service held Monday, according to the news outlet, while the family of Peter Wang will be presented with the medal at a memorial service held Tuesday. Martin Duque's family will be given the medal on Saturday.

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Cadets whose performance "involved the acceptance of danger and extraordinary responsibilities" are awarded with the medal, the Daily Beast noted.

Seventeen people were killed last week when a gunman opened fire at the school.

Since the shooting, students have become vocal advocates for gun control, demanding that lawmakers take action to prevent future tragedies.

Multiple lawmakers have also called for Congress to take action in the wake of the shooting.