MOSCOW: Russia on Friday dismissed accusations from the United States and Britain that it had tested an anti-satellite weapon in space as "propaganda". Moscow responded after the United States Space Command on Thursday accused Russia of test-firing an anti-satellite weapon in space and warned the threat against US systems was "real, serious and increasing".

The head of Britain's Space Directorate, Air Vice-Marshal Harvey Smyth, also reacted, tweeting that "actions of this kind threaten the peaceful use of space." The Russian foreign ministry insisted on Moscow's "commitment to obligations on the non-discriminatory use and study of space with peaceful aims.

"We call on our US and British colleagues to show professionalism and instead of some propagandistic information attacks, sit down for talks," the ministry said in a statement. The US said that Russia conducted a "non-destructive test of a space-based anti-satellite weapon".

"Clearly this is unacceptable," tweeted US nuclear disarmament negotiator Marshall Billingslea, adding that it would be a "major issue" discussed next week in Vienna, where he is in talks on a successor to the New START treaty. The treaty caps the nuclear warheads of the US and Russia - the two Cold War-era superpowers.

The Russian foreign ministry said tests carried out by the country's defence ministry on July 15 "did not create a threat for other space equipment and most importantly, did not breach any norms or principles of international law."

It in turn accused the US and Britain of moves to develop anti-satellite weaponry. The US and Britain "naturally keep silent about their own efforts," it said, claiming the countries had "programmes on the possible use of 'inspector satellites' and 'repair satellites' as counter-satellite weapons."

Commenting earlier Friday on the accusations, Kremlin spokesman Dmitry Peskov said Russia supports "full demilitarisation of space and not basing any type of weapons in space." The US Space Command said the test consisted of Russia's satellite called Cosmos 2543 injecting an object into orbit.

Russian state media reported in December that a satellite called Cosmos-2542, which was launched in November 2019 by the Russian military, ejected another smaller satellite once in space. The Russian defence ministry said the inspector-satellite was meant to "monitor the condition of Russian satellites," but state daily Rossiiskaya Gazeta said it could also "get information from somebody else's satellites."