Students who had been at school with suspected gunman Nikolas Cruz, 19, said "everyone predicted" he could "do something" like the tragedy that unfolded on Wednesday afternoon, and that some children had been scared of him. Soon after the shooting was reported, officers surrounded the campus and started evacuating from the scene.
Sheriff Scott Israel of Broward County also said at the news conference that families of the dead are being notified.
Law enforcement sources said the suspect used a.223 caliber, AR-15 style firearm in the shooting.
"We hear bullets coming closer and closer to us, and then we just hear kids screaming", a ninth-grade student told Miami's WPLG news station. Twelve were killed inside the school, two were killed outside of the school and one was found dead on a roadway, Israel said. Two additional victims later died at area hospitals, where sixteen people in total were taken in addition to the suspect.
"It's what looks to be the 18th school shooting in this country and we have not hit March", Murphy said.
Boogie Nights actress Moore tweeted: "The 18th school shooting in the USA since January".
Rosenblatt said that her daughter made the connection after the shooting, when she visited the purported Instagram account of the shooter.