Nine people have been arrested after a viaduct collapsed, killing nine and injuring 16 others in Zhuzhou, Hunan province.

The 160-meter section of Hongqi Road Viaduct crashed to the road below on Sunday, crushing 24 cars underneath.

The 2,750-m bridge was to have been demolished yesterday and a section of the structure a few dozen meters long was removed in a trial demolition on May 15.