The FBI has confirmed that it was warned about the teenager who allegedly carried out a mass shooting at his former school in Florida.
Nikolas Cruz who has been charged with 17 counts of premeditated murder, reportedly left a comment on a YouTube video last year stating: "I'm going to be a professional school shooter."
A user alerted authorities to the post.
Teachers were also warned about Cruz, who was not allowed on campus with a backpack.
The FBI said it had investigated the YouTube comment but had been unable to fully identify the person who posted it.
Seventeen people were killed and many more were injured in the attack at Marjory Stoneman Douglas High School in Parkland, Florida.
Several people are in a critical condition.
One of those that died was the school's assistant football coach who jumped in front of students to shield them from bullets.
This is the deadliest shooting at a US school since 2012.
[Source: bbc.com]
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