By Rob Picheta, Stephanie Halasz, Claudia Otto and Nadine Schmidt, CNN

(CNN) — A shooter opened fire at a high school in the Austrian city of Graz on Tuesday, killing 10 people, including teenagers, in one of the worst rampages in the country’s history.

Austrian police and hospital officials confirmed the fatalities, raising the death toll from an earlier figure of nine. The country’s interior ministry told CNN that the victims included children between 14 and 18 years old.

Interior minister Gerhard Karner said at a news conference that six victims were female and three were male. Twelve students were injured in the incident, some of them seriously, Karner added. Graz University Hospital later said one of the seriously injured adults died on Tuesday evening.

The suspect – a 21-year-o

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