MUMBAI: Metro construction sites across the city continue to pose a serious threat for motorists and commuters after a 23-year-old man suffered serious injuries when a cement block fell on his head from an under-construction Metro bridge at Kashimira on Sunday evening, a day after a 54-year-old plumber-cum-delivery executive was killed by a falling iron barricade at a Metro 4 construction site in Vikhroli West.
