The United States convened an expert-level meeting this month from China, France, Russia and the United Kingdom to discuss issues related to nuclear weapons including those related to reducing strategic risk, the State Department announced.

The State Department said Washington hosted the June 13-14 meeting in Cairo among the five nuclear-weapon states, describing it as “an ongoing exchange of views under the Nuclear Non-Proliferation Treaty (Non-Proliferation Treaty / NPT)’.

The experts came from the respective foreign and defense ministries of these countries, the ministry said. “They discussed strategic risk reduction, as well as nuclear doctrine and policy,” the State Department statement added.

The NRT, which came into force in 1970, aims to stop the spread of nuclear weapons capability and to guarantee the right of members to develop nuclear energy for peaceful purposes.

The treaty allowed the five nuclear-weapon states – which are the permanent members of the United Nations Security Council – to retain their nuclear arsenals.