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By Stephanie Nebehay
GENEVA (Reuters) - The United States voiced deep suspicion on Tuesday over Russia's pursuit of new space weapons, including a mobile laser system to destroy satellites in space, and the launch of a new inspector satellite which was acting in an "abnormal" way.
Russia's pursuit of counterspace capabilities was "disturbing", Yleem D.S. Poblete, U.S. Assistant Secretary of State for Arms Control, Verification and Compliance, told the U.N.'s Conference on Disarmament which is discussing a new treaty to prevent an arms race in outer space.
A Russian delegate at the conference dismissed Poblete's remarks as unfounded and slanderous.
Russian Foreign Minister Sergei Lavrov, at the Geneva forum in February, said a priority was to prevent an arms race in outer space, in line with Russia's joint draft treaty with China presented a decade ago.
But Russian President Vladimir Putin unveiled in March "six new major offensive weapons systems", including the Peresvet military mobile laser system, Poblete said.
"To the United States this is yet further proof that the Russian actions do not match their words," she said.
Referring to a "space apparatus inspector", whose deployment was announced by the Russian defence ministry last October, Poblete said: "The only certainty we have is that this system has been 'placed in orbit'."
She said its behaviour on-orbit was inconsistent with anything seen before, including other Russian inspection satellite activities, adding: "We are concerned with what appears to be very abnormal behaviour by a declared 'space apparatus inspector'."
Russia's pursuit of counterspace capabilities "is disturbing given the recent pattern of Russian malign behaviour," she said, and its proposed treaty would not prohibit such activity, nor the testing or stockpiling of anti-satellite weapons capabilities.
Alexander Deyneko, a senior Russian diplomat in Geneva, dismissed what he called "the same unfounded, slanderous accusations based on suspicions, on suppositions and so on".
The United States had not proposed amendments to the Sino-Russian draft treaty, he said.
"We are seeing that the American side are raising their serious concerns about Russia, so you would think they ought to be the first to support the Russian initiative. They should be active in working to develop a treaty that would 100 percent satisfy the security interests of the American people," he said.
"But they have not made this constructive contribution," he said.
China's disarmament ambassador Fu Cong called for substantive discussions on outer space, leading to negotiations.
"China has always stood for peaceful use of outer space and we are against weaponization of outer space, an arms race in outer space, or even more turning outer space into a battle field," he said.
(Reporting by Stephanie Nebehay; Editing by Richard Balmforth)