Around 100 people were hospitalized late Thursday after a chemistry experiment at a German university went wrong, emergency services and a university spokeswoman said. Only three of those hospitalized showed severe symptoms, said a fire brigade spokesman, while the others had been brought in for observation. Around 100 fire brigade officers had been called to evacuate the building at Dresden's Technical University in eastern Germany, dpa reported. It was not immediately clear how the accident had occurred but it possibly involved arsine, a compound of arsenic and highly toxic.