Hiroshima Mayor Kazumi Matsui on Monday called on world leaders to visit the A-bombed city amid growing expectations that President Barack Obama will become the first sitting U.S. leader to do so later this month.

"The people of Hiroshima and Nagasaki ask leaders around the world to visit the A-bombed cities and feel the earnest wishes of hibakusha that 'no one else shall ever again suffer as we have,' " Matsui told a U.N. open-ended working group on nuclear disarmament in Geneva.

Although Obama has not yet confirmed he will visit Hiroshima when he travels to Japan for the Group of Seven summit in Mie Prefecture from May 26 to 27, senior U.S. officials say he plans to make the trip.

"We sincerely hope that the government representatives who have understood the earnest wishes of hibakusha for peace can cooperate with each other, transcend their differences and overcome obstacles to nuclear abolition," Matsui said.

Last month, Matsui said he will not seek an apology from Obama for the decision to use atomic bombs during the war. The second and last city to experience an A-bomb attack was Nagasaki, which was destroyed three days after Hiroshima.

Matsui, speaking at the U.N. European headquarters, also said the meeting would serve as a forum for constructive and effective discussions on a convention that outlaws nuclear weapons for all U.N. member states.