In pics: 'Lights out' mourning ceremony for Nanjing Massacre survivors who passed away this year

A "lights out" mourning ceremony for four survivors of the Nanjing Massacre who passed away this year was held Tuesday in Nanjing, East China's Jiangsu province.

Two survivors of the Nanjing Massacre passed away on Feb 15 this year, bringing the number of living registered survivors to 28, according to the Memorial Hall of the Victims in Nanjing Massacre by Japanese Invaders.