17 students shot dead by ex-student at Florida high school assault

PARKLAND (Florida): A 19-year-old gunman returned to the Florida high school where he had once been expelled for disciplinary problems and opened fire with an assault-style rifle on Wednesday, killing 17 people and injuring more than a dozen others before he was arrested, authorities said.

The violence erupted shortly before dismissal at Marjory Stoneman Douglas High School in Parkland, a placid, middle-class community about 45 miles (72 km) north of Miami. Television footage showed images, increasingly familiar in America, of bewildered students streaming out of the building with hands raised in the air, as dozens of police and emergency services personnel swarmed the area.

Florida´s two US senators, briefed by federal law enforcement officials, said the assailant wore a gas mask as he stalked into the school carrying a rifle, ammunition cartridges and smoke grenades, then pulled a fire alarm, prompting students and staff to pour from their classrooms into hallways.