Chinese authorities have detained four people, state media said Saturday, a day after at least 11 people died when a truck loaded with fireworks for Lunar New Year celebration exploded, collapsing an elevated portion of highway in central China. The accident sent vehicles plummeting 30 meters (about 100 feet) to the ground, and state-run China Central Television said 11 people were now confirmed dead and another 11 injured. The official Xinhua News Agency said the collapse smashed and buried at least 25 vehicles. Rescue work continues Saturday. CCTV said Saturday that the truck that exploded took the road without proper...