Foreign ministers from the United States and Russia will begin talks over nuclear arms control but it may not lead to an extension of the START3 nuclear disarmament treaty, President Vladimir Putin said Saturday.

“We have charged our respective foreign ministers with starting consultations on this subject but we can not yet say whether this will lead to an extension of START3,” Putin told reporters after a G20 summit in Osaka on Saturday.

The two countries are currently covered by the New START treaty signed in 2010, which caps the number of nuclear warheads well below Cold War limits.