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Police in Finland detained a 16-year-old boy last week, after posting a YouTube video online. 

The video, "Maaninka massacre",  was published just days after eight people were killed by a student who had posted a similar video online.

Police said the boy said his video was a joke and his computer has been confiscated.

The video threat against Maaninka school, happened 18-year-old boy shot six classmates, two staff members and then turned the handgun on himself.  Reportedly, the 18-year-old posted he was planning a school massacre with his last positing made less than hour before the shootings occurred.