A Chinese building maintenance crew has been detained by police after a woman was found dead in an elevator shaft that had its power wrongly cut off a month earlier.

The Gaoling district government in the north-western city of Xi’an in Shaanxi province said two maintenance workers had turned off the power source on 30 January in a residential building after they were called to fix a glitch.

But they failed to carry out a safety check to see if anyone was inside before pulling the plug.

When the maintenance crew returned on 1 March to carry out repairs they found a female corpse inside.

The woman has not been named but was preliminarily identified as a 43-year-old resident who lived alone.

Police have ruled out foul play but said her death was caused by gross negligence on the part of the maintenance crew - and that the case was being treated as involuntary manslaughter.

China has a poor track record when it comes to health and safety.

China opens terrifying glass-bottomed bridge Show all 5 1 /5 China opens terrifying glass-bottomed bridge China opens terrifying glass-bottomed bridge A woman plays around as she walks across a glass-bottomed suspension bridge in a scenic zone in Pingjiang county AP China opens terrifying glass-bottomed bridge An aerial view shows a glass suspension bridge at the Shiniuzhai National Geo-park in Pinging county, Hunan province Reuters China opens terrifying glass-bottomed bridge Tourists look down as they walk on a glass suspension bridge at the Shiniuzhai National Geo-park in Pinging county, Hunan province Reuters China opens terrifying glass-bottomed bridge Tourists walk on a glass suspension bridge at the Shiniuzhai National Geo-park in Pinging county, Hunan province Reuters China opens terrifying glass-bottomed bridge The bridge is named Haohan Qiao, which translates to “Brave Men’s Bridge” Rex

In July, a Chinese woman in Jingzhou in the centre of the country was swallowed by a mall escalator when the metal top suddenly caved in.

She managed to push her two-year-old to safety but died of her injuries.

A month later, 12 government officials and company executives in Tianjin were detained over a huge warehouse explosion which killed 145 workers.

Chinese man falls down elevator shaft