At least 17 people are dead after a 19-year-old man opened fire at a high school campus in Parkland, Florida.
The suspect was Nikolas Cruz, a former student at the school who had been expelled. He escaped with fleeing students but is now in police custody.
As the attack unfolded students were forced to hide as police swooped in on the building.
It is the deadliest school shooting since 26 people were killed at Connecticut school Sandy Hook in 2012.
It is the sixth school shooting incident this year so far that has either wounded or killed students.
Three people remain in a critical condition and three others are in stable condition, health officials said.
The victims are still being identified. Sheriff Israel said a football coach was among the dead but no names have been released.
How the attack unfolded
The attack began at 14:30 local time (19:30 GMT) on Wednesday at the Marjory Stoneman Douglas High School in Parkland, about an hour north of Miami.
The local public school district tweeted that “students and staff heard what sounded like gunfire” just before the end of the day.
Witnesses said that the suspect set off a fire alarm before he began shooting.
- Florida shooting: A survivor’s story
- As it happened: Florida school gunman shoots ‘dozens’
Police and Swat team members swarmed the campus and began clearing students from the school, as parents and ambulances converged on the scene.