The site of a collapsed section of the Seosomun Overpass in western Seoul is seen on Thursday. (Yonhap) Police on Friday raided the offices of the Seoul city government and others involved in the demolition of an overpass in western Seoul that partially collapsed earlier this week.A section of the Seosomun Overpass undergoing demolition collapsed Tuesday, leaving three people dead and three others injured.The Seoul Metropolitan Police Agency said it began searches and seizures at seven locations, including the city government's infrastructure headquarters and contractors involved in the demolition work, as part of its investigation into the collapse. (Yonhap)