Around one hundred spectators were injured during a fireworks display at the opening of the West Lake International Expo on Saturday in the eastern Chinese city of Hangzhou.

A flurry of fireworks, which organizers billed as low-altitude and low-pollution, fell into the audience standing by the Grand Canal.

Many of the injured have now been discharged from hospital, while five others remained hospitalised for observation and further treatment.

The cause of the accident is still under investigation.