Fifteen survivors of the mass shooting at Marjory Stoneman Douglas High School filed suit in federal court Wednesday against Broward County, Broward Schools Superintendent Robert Runcie, Sheriff Scott Israel and law enforcement officers who responded to the scene.

The plaintiffs allege the sheriff’s office, school and county officials failed in their duty to protect students against the rampage by confessed shooter Nikolas Cruz, who carried out one of the deadliest school shootings in U.S. history. The Feb. 14 shooting at the school in Parkland left 17 dead.