Soviet Union, the disaster was investigated. The Soviet report concluded that the majority of the deaths were not caused directly by the initial fire but were the result of carbon monoxide poisoning and suffocation resulting from decisions of the Japanese. Accidents by year This is an incomplete list of notable mining accidents and disasters: 19th century May 25, 1812: Felling Colliery Disaster explosion killed 92 men and boys. July 15, 1856: Cymmer Colliery explosion in Cymmer, Rhondda Cynon Taf, Wales. 114 men and boys killed. 1872: Pelsall Hall Colliery disaster in Pelsall, West Midlands, England. 23 people died. 1880: Seaham Colliery explosions in County Durham, England. The mine suffered an underground explosion which resulted in the deaths of upwards of 160 people, including surface workers and rescuers. February 16, 1883: Diamond Mine Disaster in Illinois. 74 men and boys killed. March 13, 1884: Pocahontas (East) (Laurel) in Tazewell County, Virginia. More than 114 men and boys killed. 1885: Mardy Colliery in Rhondda Cynon Taf, Wales. 85 men and boys killed. June 17, 1890: Dunbar Furnace Company Hill Farm Mine in Connellsville, Pennsylvania. 30 miners died. July 3, 1890: Jordan mine in Lexington, Virginia. While four miners were ascending at the end of the night shift, the cable broke. The cage fell 140 feet, killing three workers and injuring one. Unknown date, 1890: Coalburg, Alabama Eleven killed. 1892: Osage Coal & Mining Company's No. 11 mine explosion in Krebs, Oklahoma. Nearly 100 died. 1892: St Mary ore mine fire. Příbram, now Czech Republic, then Austria-Hungary, 319 died. July 4, 1893: Combs Colliery disaster in Thornhill, England, 139 men & boys died. 1899: Sumitomo Besshi bronze mine area, landslide with debris flow disaster, Niihama, Shikoku, Japan; 512 died. 20th century 19 May 1902: 216 miners were killed in the Fraterville Mine disaster in Fraterville, Tennessee 25 January 1904: 179 miners and two aid workers were killed in the Harwick mine disaster, Harwick, Pennsylvania 28 April 1904: 63 people were killed in Villanueva del Río, Sevilla; it was the worst mining accident recorded in Spain. 28 October 1904; 19 miners were killed in Tercio, Colorado by a coal dust explosion. 20 February 1905 Virginia City Mine explosion (Alabama), 112 killed. March 10, 1906: Courrières mine disaster in Courrières, France. 1,099 workers died in the worst mine accident in European history. December 1, 1907: Naomi Mine Explosion in Fayette City, Pennsylvania. 34 workers died.