Russian and U.S. negotiators continued to formulate a new nuclear arms reduction treaty in their just-concluded talks in Geneva, the Russian Foreign Ministry said on Saturday.

The sixth round of the Russian-U.S. negotiation, which was held in a businesslike and constructive atmosphere, discussed particular wording of the treaty, the ministry said in a statement.

"Working groups of experts coordinated the articles of a new draft treaty and its technical aspects," it said.

Russian Foreign Minister Sergei Lavrov and his U.S. counterpart Hillary Clinton will be informed about the outcomes of the talks during their upcoming meeting in Moscow later this month, it said.

The next round of talks was scheduled for mid-October in Geneva, it added.

Six rounds of fully fledged talks have been held between the two sides since Russian President Dmitry Medvedev and his U.S. counterpart Barack Obama agreed in London in early April to work out a replacement for the Strategic Arms Reduction Treaty (START I).

START I, which was set on the reduction and limitation of strategic offensive arms between the two countries, was signed in 1991 and is due to expire in December.