Police officers and firefighters gather at the entrance to the Sasago Tunnel on the Chuo Expressway in Otsuki, Yamanashi Prefecture, in central Japan, on Sunday, Dec. 2, 2012. Parts of the tunnel collapsed, trapping an unknown number of vehicles, as smoke from a fire inside prevented rescuers from approaching. (AP Photo/Kyodo News)

Photo by: Uncredited

Police officers and firefighters gather at the entrance to the Sasago Tunnel on the Chuo Expressway in Otsuki, Yamanashi Prefecture, in central Japan, on Sunday, Dec. 2, 2012. Parts of the tunnel collapsed, trapping an unknown number of vehicles, as smoke from a fire inside prevented rescuers from approaching. (AP Photo/Kyodo News)