Innsbruck-A 13-year-old is said to have announced a killing spree at an Innsbruck middle school in mid-May. The police researched the young people as suspects and this is confessed, it said on Tuesday. The Austrian is said to have called the control center on May 14th and threatened the attack for the following day. The school was examined and monitored by the police. The costs of over 11,000 euros were incurred. The police want to demand the sum.