BERLIN, GERMANY - JUNE 25: Police, who have turned their backs in order to hide their faces from cameras, stand guard at the Gerhart-Hauptmann-Schule school in Kreuzberg district where approximately 40 refugees have barricaded themselves inside with objects doused in gasoline on June 25, 2014 in Berlin, Germany. Approximatly 250 refugees, including Africans and Roma, were staying at the school under unhygienic conditions and most accepted an offer to move elsewhere when police arrived to clear the building yesterday. However, about 40 remain and are occupying the roof of the building. (Photo by Sean Gallup/Getty Images)