A two minute silence was held in Manchester to remember the victims of the World War II atomic bombings in Hiroshima and Nagasaki.
More than 200,000 people died when the Japanese cities were hit on 6 and 9 August 1945 as the war came to an end.
The 65th anniversary of the attacks was marked with a ceremony at the Peace Garden on St Peter's Square.
Manchester developed links with the two Japanese cities after being declared a Nuclear Free City in 1980.
Councillor Mark Hackett, Lord Mayor of Manchester, laid a wreath in memory of the victims.
"I am honoured to be leading the ceremony to remember the victims of the Hiroshima and Nagasaki bombings, one of the saddest anniversaries of the 20th Century," he said.
"I hope the ceremony allows us all to reflect on the real cost of all conflicts and honour the ordinary men, women and children who have so needlessly died."
Tomihisa Taue, the Mayor of Nagasaki, will visit Manchester in November as part of a series of events marking the 30th anniversary of the city's nuclear-free status.
He is due to launch a new peace and justice trail through the city centre and a photographic exhibition at the People's History Museum.