A contract worker died in hospital hours after collapsing in the basement of a sewage treatment plant on Saturday, with Hong Kong’s Drainage Services Department ordering his employer to investigate. Department director Ringo Mok Wing-cheong expressed sorrow over the death of the worker and urged the contractor to provide appropriate help to the man’s family, halt the project and investigate the case. The victim, a 49-year-old man surnamed Tam, was installing electric equipment in the basement of...