During the Siege of Sarajevo during Bosnian War between 1992 and 1995, the Sarajevo Tunnel was constructed by the besieged citizens of Sarajevo in order to link the city of Sarajevo, which was entirely cut-off by Serbian forces, with the Bosnian-held territory on the other end of the supposedly neutral area at the Sarajevo Airport controlled by the United Nations. The tunnel linked the Sarajevo neighbourhoods of Dobrinja and Butmir.