A 19 year old has been charged with 17 counts of premeditated murder

A teenager has been charged with 17 counts of premeditated murder after yesterday's mass shooting at a High school in Florida.

Nikolas Cruz, who's a former student at Marjory Stoneman Douglas High School was arrested outside the school in Parkland near Miami yesterday.

Police say the gunman deliberately set off fire alarms so students would leave their classes. Twelve people were shot dead in the school building, two outside, one in the street and two people were left with injuries from which they later died.

CORRECTS SPELLING TO MARJORY NOT MARJORIE Students are evacuated by police from Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018, after a…

Students are evacuated from the school

Among those who tried to save students was football coach Aaron Feis, who died after apparently using his body as a shield against the bullets.

The suspected gunman, a 19-year-old expelled student, has been arrested.

This is America's 18th school shooting this year and third deadliest ever.

Video has emerged that shows students cowering in a classroom as loud rapid shots are heard nearby.

President Trump has extended his condolences to the families and victims.

A family reunites outside of Stoneman Douglas High School in Parkland, FL, USA, after a shooting on Wednesday, February 14, 2018. Photo by John McCall/Sun…