ACCRA—An explosion in Ghana’s rural Western Region on Thursday razed hundreds of buildings and killed an unknown number of residents when a truck carrying explosives to a gold mine collided with a motorcycle. Unverified videos posted on local media showed a large, smouldering blast site in which buildings had been reduced to piles of wood, brick and twisted metal. In one video, two bodies are seen crumpled on the ground, covered in dust. A photo shared by a local council member showed a deep crater at the epicenter of the blast, onlookers peering down from its rim. Seji Saji Amedonu, deputy director general of the National Disaster Management Organization, said 500 buildings had been destroyed. A regional emergency official told local media he had seen 10 dead bodies. “The public has been advised to move out of the area to nearby towns for their safety while recovery efforts are underway,” …