A 19-year-old man has been charged with 17 counts of premeditated murder following a mass shooting at a school in Florida.
Teachers were reportedly warned in advance about the behaviour of Nikolas Cruz, who had been expelled from Marjory Stoneman Douglas High School in Parkland, Florida.
Seventeen people were killed and dozens more injured in the deadliest US school shooting since 2012.
Steve Mort is in Florida and says a picture is beggining to emerge of the suspect.
IN: "Police have been..."
OUT: "...fairly recently."
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