Seventeen people were killed in a school shooting at Marjory Stoneman Douglas High in Parkland, Fla. on Feb. 14. Nikolas Cruz, 19, admitted to committing the shooting, according to CNN.

Cruz arrived at the Florida high school at 12:19 p.m. carrying a duffel bag with loaded magazines and an AR-15, a semi-automatic rifle. Cruz, an expelled former student of the high school, was arrested several hours after the shooting when he was seen walking in a residential area, according to the New York Times.

“I felt very heartbroken that this happened because these were innocent high school students being shot for no reason,” sophomore Samira Feili said. “This event has made a lot of communities very heartbroken.”

This Florida shooting raises many questions regarding gun control in the United States. In Florida, the minimum age to purchase a handgun is 21, though the minimum age to purchase an AR-15 is 18, according to CNN.

“I just know we must prioritize lives over guns,” Douglas High senior Dylan Redshaw, 17, said. “We just need age restrictions and high-quality, accessible mental health institutions and higher checks when people are trying to purchase these weapons.”

The students who survived the shooting immediately took action against gun violence by speaking out. Douglas High junior Cameron Kasky and others who survived the attack are working to spur a national movement. They have made plans to start a rally called “March For Our Lives” against gun violence in Washington D.C. on March 24 along with other nationwide protests.

“There’s grieving obviously, but we’re breathing and coping through our voices, not through our tears,” Stoneman Douglas High senior Alex Wind, 17, said. “Now is the time for action, for power and strength.”