A British hospital worker died and his wife was injured when an explosion tore through their car as they drove through Riyadh, the Saudi capital. Britain's Press Assn. said the victims, Christopher and Jane Rodway, were in their 40s and had lived in Saudi Arabia for eight years. The couple's car might have been booby-trapped, according to a police statement. Earlier, Saudi sources had said an explosive device was thrown into the vehicle from the outside. The explosion came just hours before the start of an international energy conference in Riyadh.