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. Last Updated: 07/27/2016

Motives Sought for Shooting

TUUSULA, Finland -- A teenager who killed eight people in a high school shooting in Finland was a social outcast who was bullied in school but appears to have picked his victims randomly, a senior police official said Thursday.

Police said Auvinen killed eight people before turning a gun on himself in a shooting rampage Wednesday at Jokela High School in Tuusula, some 50 kilometers north of the capital, Helsinki.

"You can say that the motive is still open," detective superintendent Tero Haapala said. "But the explanation can be found mainly in his web writings and his social behavior."

Investigators believe the killer, identified as Pekka-Eric Auvinen, 18, revealed plans for the attack in videos on YouTube, in which he urges revolution and grins after taking target practice.

Police initially said the victims were seven students and the school principal, but Haapala said Thursday that the school nurse was among those killed.

He said Auvinen appeared to have selected his victims at random.

Auvinen shot the victims with a .22-caliber pistol, police said, adding that about a dozen other people were injured as they tried to escape from the school.

The gunman then shot himself in the head and died hours later at a hospital.

Witnesses described a scene of mayhem in the leafy lakeside community, in which the assailant scoured the school for victims while shouting a slogan of "revolution."