A commenter calling themselves Nikolas Cruz made one chilling comment on a clip about the notorious 1966 University of Texas clock tower sniper

THE Florida school shooter left a chilling comment on a YouTube video about another mass shooting last year promising a copycat attack, it has been claimed.

Nikolas Cruz, 19, massacred 17 people and injured dozens more in a bloody gun rampage at his former school in Parkland, Florida, yesterday.

A commenter calling themselves Nikolas Cruz wrote this under a clip about another infamous mass shooting

It has since emerged the teen’s social media pages were filled with disturbing content, with ex-schoolmates claiming they “knew he would shoot up the school”.

And it has now been claimed that the killer – who has since been charged – posted an ominous comment on a YouTube video about another infamous massacre.

Writing underneath a documentary clip about the notorious 1966 University of Texas clock tower sniper, a commenter called Nikolas Cruz wrote: “I’m going to [do] what he did.”

The comment has seemingly been deleted from the website since news of the shooting broke.

Chilling pictures were posted by shooter Nikolas Cruz on his Instagram page showing him holding up knives

Nikolas Cruz is behind bars after being charged with 17 counts of murder after the terrifying attack

Cruz is pictured being led by police officers after his arrest in Florida

The 19-year-old was expelled from the school for ‘disciplinary reasons’, according to police