Nagasaki Mayor Tomihisa Taue on Tuesday urged the international community to draw upon its "collective wisdom" to free the world of nuclear weapons as the city marked the 71st anniversary of its atomic bombing by the United States.

In his Peace Declaration delivered at the annual ceremony in Nagasaki Peace Park, Taue said new frameworks aimed at containing nuclear proliferation are necessary if mankind is to be prevented from destroying its future.

"Now is the time for all of you to bring together as much of your collective wisdom as you possibly can, and act," he said.