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SAN MATEO, Calif. — The 17-year- old former Hillsdale High student who set off two bombs at the school Monday and was carrying eight more strapped to his chest was targeting school staffers as part of a revenge plot, authorities said Tuesday.
“This was a coldblooded plot of execution,” Police Chief Susan Manheimer said.
Manheimer said the quick thinking of several teachers prevented “mass casualties.” Alex Youshock also had a sword and a chain saw but no gun. He was tackled by a teacher after he set off the second bomb in an empty hallway. No one was hurt by the bombs.
