A photo taken on Nov 7, 2023 shows the Yuecheng Sports Club gymnasium, whose roof collapsed the day before, in Huanan, Heilongjiang province. (PHOTO / XINHUA)

A total of 11 key people related to the collapse of a gymnasium roof in Heilongjiang province have been taken into police custody, China Central Television reported on Friday.

READ MORE: Heilongjiang gymnasium collapse kills three

Three people have been confirmed dead and two injured after the collapse on Monday evening in Huanan county of Jiamusi city, and the disciplinary inspection and supervision departments from Jiamusi and Huanan have set up a team to conduct an investigation.