G7 Hiroshima Declaration calls for 'world without nuclear weapons'

US Secretary of State John Kerry and G7 foreign ministers on Monday called for a "world without nuclear weapons", citing North Korea's sabre-rattling as a key challenge to achieving that goal.

"We reaffirm our commitment to seeking a safer world for all and to creating the conditions for a world without nuclear weapons in a way that promotes international stability," the group said in their "Hiroshima Declaration", after a landmark visit to the Japanese city's atomic bomb memorial.

"This task is made more complex by the deteriorating security environment in a number of regions, such as Syria and Ukraine, and, in particular by North Korea’s repeated provocations," it added.