Police in Germany have received more threats to schools since teenager Tim Kretschmer went on a deadly rampage in the south west of the country on Wednesday killing 15.Police closed a school in Ilsfield after finding a warning in an internet chat room that a shooting spree was planned there. After searching the premises nothing suspicious was found and the school re opened. A local police spokesman said: “Last night we found some evidence in an internet chatroom that a shooting was to take place in Ilsfield. The police take such warnings or threats seriouslz so this morning we took the necessary measures. WE were able to stop the pupils here and send them home and the few who arrived here were taken care of by police officers and teachers.” Police have been looking at the authenticity of an internet warning said to have been posted by Kretschmer. The message predicted his shooting spree, but police think the posting may be a fake. After shooting 9 students and 3 teachers at his former school Kretschmer walked to a psychiatric clinic opposite an killed a gardener. The motive for the rampage is still unclear although he seems to have targetted women inside the school. Police say he was well trained in firing weapons including his father s Beretta handgun used in Wednesday s killing spree. Kretschmer attended five sessions as a psychiatric clinic in Weissenhoff last zear and was supposed to continue treatment as an outpatient. He broke off the treatment. Meanwhile outside the school where Kretschmer carried out his attack flowers and other tributes have been growing for the innocent victims.