Firefighters work on site where a large explosion occurred at a restaurant in Sapporo, Japan, Dec.16, 2018. According to local media reports, an explosion that triggered a fire occurred at a restaurant in Sapporo in the evening. The cause of the explosion is still unknown. At least 20 people have been reported injured and taken to hospitals. (Photo/Agencies)
Firefighters work on site where a large explosion occurred at a restaurant in Sapporo, Japan, Dec.16, 2018. According to local media reports, an explosion that triggered a fire occurred at a restaurant in Sapporo in the evening. The cause of the explosion is still unknown. At least 20 people have been reported injured and taken to hospitals. (Photo/Agencies)
Dozens of people were injured Sunday in an explosion at an izakaya, or a Japanese-styled pub, in the city of Sapporo in Japan's northernmost Hokkaido prefecture, Dec.16, 2018. (Photo/Agencies)
Dozens of people were injured Sunday in an explosion at an izakaya, or a Japanese-styled pub, in the city of Sapporo in Japan's northernmost Hokkaido prefecture, Dec.16, 2018. (Photo/Agencies)
