The Hiroshima city government said Thursday representatives from 91 nations and the European Union are scheduled to attend its annual ceremony on Saturday to commemorate the U.S. atomic bombing in 1945.

Among the recognized nuclear weapons states, Britain, France, Russia and the United States are expected to send diplomats to the ceremony in the city's Peace Memorial Park, but China will not.

U.S. Ambassador to Japan Caroline Kennedy, who attended the past two anniversary ceremonies, will not be present this year, the city government said. Kennedy accompanied Barack Obama on his historic trip to Hiroshima in May when he became the first U.S. president to visit an atomic-bombed city.