GUANGZHOU, April 14 -- One person who was injured in a gantry collapse in south China's Guangdong Province Wednesday morning has been discharged from hospital as of Thursday afternoon, local authorities said.

The gantry in a factory in Mayong Township, Dongguan City, fell on a two-story temporary building made from containers. The incident occurred during a thunderstorm, which brought with it winds of up to 100 km per hour, between 5:40 a.m. and 7 a.m. Wednesday.

There were 139 workers in the building at the time, 18 died and 33 were injured. Eighteen of the injured were hospitalized.

The remaining 17 injured workers are still being treated at the People's Hospital of Dongguan City. They sustained fractures, crush injuries and bruises, but are in a stable condition, according to the information office of the Dongguan Municipal Government.

The factory, which belongs to the Fourth Harbor Engineering Co. Ltd., a subsidiary of China Communications Construction Co. Ltd., mainly produced prefabricated parts.

As of Thursday noon, the relatives of 16 of the deceased had arrived in Dongguan. The local government sent working teams to offer support and help them cope with the aftermath.