NANCHANG, Feb. 28 -- The death toll from an apartment building collapse in east China's Jiangxi Province has risen to six as rescuers ended a 34-hour rescue operation Sunday morning.

Eight survivors, including one injured, were pulled out alive from debris after the three upper floors of the six-story building collapsed in Anyuan District, Pingxiang City on Friday afternoon.

A preliminary investigation showed the accident was caused by an improper renovation conducted at an apartment on the fourth floor, leading to the collapse of the upper stories.

The city government said it would help treat the injured, take care of relatives of the dead and relocate residents.

The provincial government issued a circular Saturday ordering a safety overhaul of all old residential buildings.