beijing chinese police detain 11 people connection deadly skyscraper fire northern port city tianjin municipal government say sunday investigation find numerous fire code violations blaze kill 10 injure five early friday morning cause renovation materials catch fire 38th floor service apartment build tianjin government say post official weibo account say company responsible renovations leave fire prevention water tank empty render firefighting equipment useless allow fire spread quickly fire safety come scrutiny attract increase media attention china deadly blaze last month kill 19 far southern fringe beijing lead citywide evictions see people unfairly target vulnerable underclass spark drill work cause blaze warehouse store rubber products logistics park china eastern shandong province friday though casualties report sunday another fire break small insulation factory xian northwestern shaanxi province casualties report one dead tianjin fire renovation workers sleep site regulations men migrant workers chinese provinces tianjin party secretary li hongzhong say authorities would carry citywide fire safety inspections response friday blaze official tianjin daily report chinese police detain 11 deadly tianjin skyscraper fire