Mexico City's fire department says a building has collapsed, killing a construction worker and seriously injuring 20 others. According to AP, the department's superintendent Raul Esquivel says the workers were mixing cement on an upper level platform for a new three-story building in a middle-class neighborhood. The platform couldn't stand the weight of the concrete mixture and collapsed, taking down the workers working above and crushing others below. Esquivel says a 30-year-old construction employee died in the early Saturday accident in the capital's Del Valle neighborhood, and 20 other workers were taken to nearby hospitals with blows to various parts of their bodies. He says 14 other workers escaped major injuries. The Federal Electricity Commission says it had hired a private company to construct the building for the government utility.