An overcrowded tour bus lost control on a slope and flipped over Thursday in Hong Kong, killing 17 members of a local religious group and injuring 45 others, AP reported. The driver was arrested on charges of dangerous driving. After visiting the injured, Hong Kong leader Donald Tsang told reporters it was the city's worst traffic accident in recent years. A double-decker bus crash killed 21 people in 2003. Most of the victims were critically injured, suffering head injuries, severe bleeding and broken bones, Li said. Most of those who died were women, he added.