A student in Berlin Technical University threatened to blow up a building in his school on Wednesday, reported local newspaper, but police said the situation remained unclear. According to Berliner Zeitung, the student was banned to enter the university and then threatened a professor to detonate a bomb, requesting the ban to be lifted. A polices pokesman confirmed to Xinhua that a suspect was threatening a professor after being banned to enter the university. But "its not like what the media reported," the spokesman said. "We didn't hear that he had a bomb. We will continue to clarify the situation."