A Japanese atomic bomb survivor and an Aboriginal Australian who lived through multiple nuclear tests slammed their respective governments Tuesday for not participating in U.N. negotiations on a treaty to ban nuclear weapons.

"I especially condemn the Japanese government's inability to fully commit to these negotiations," said Setsuko Thurlow, who lived through the atomic bomb blast on Aug. 6, 1945, that destroyed her hometown of Hiroshima.

"Indeed, yesterday morning the Japanese government official's speech deepened hibakusha's feelings of being continuously betrayed and abandoned by their own country," she said in her speech during a session of the negotiations.