The highly unusual incident suggested disarray in Russia's military establishment and state media over how to report the battlefield situation in southern Ukraine.
It said that, after the regrouping, the Dnepr force would release some troops to be deployed in offensives on other fronts.
RIA said the Russian military command had agreed with the Dnepr leadership's conclusions and ordered the relocation of troops to start.
Another state agency, TASS, published just one alert on troops regrouping to more favourable positions, and then withdrew it, saying it had been released in error.
Russian state media have privileged access to official briefings and typically report major military announcements shortly before they appear in the Telegram channel of the defence ministry.
Persons:
Volodymyr Zelenskiy, Mark Trevelyan, Alexander Marrow, Kevin Liffey
Organizations:
RIA, LONDON, RBC, Russian Ministry of Defence, Dnipro, Telegram, Reuters, Thomson
Locations:
Moscow, Dnipro, Ukraine, Dnepr, Russia, Kherson, Russia's, Russian, The U.S, Ukrainian