Survivors of the 1945 U.S. atomic bombings of Hiroshima and Nagasaki asked prefectural governments Friday to recognize them as sufferers of radiation sickness.

About 60 survivors are expected to file similar applications in 15 prefectures, including Hiroshima and Nagasaki, by the end of the day, according to sources.

The mass application follows the July 9 application by 76 survivors seeking similar recognition of how their health had been affected by their exposure to radiation 57 years ago.