As rescue efforts concluded early Friday morning, 10 people were confirmed dead from a building that collapsed in Shanghai the previous day, according to the city’s work safety administration.

The incident happened around 11 o’clock Thursday morning in the city’s Changning District, when the walls of the building, which had been undergoing renovation, came crashing down. By the time rescue efforts were winding down at around 2 a.m. Friday morning, 25 people had been found trapped at the site, 10 of whom were pronounced dead at local hospitals.

The identities of the dead and injured have not been disclosed, though most are believed to be construction workers. The city’s work safety administration said it is investigating the cause of the incident.

According to local media, the 3,000-square-meter commercial complex was supposed to open for business by the end of May. About two-thirds of the structure remain standing. (Image: @中国消防 on Weibo)