Russia has admitted suffering “significant losses of troops” in Ukraine, as the invasion enters its 44th day.
Presidential spokesman Dmitry Peskov told British channel Sky News the casualties were a huge tragedy for Russia.
He said he hoped Moscow would reach its war goals “in the coming days”.
Mr Peskov’s comments followed Russia’s expulsion from the United Nations Human Rights council on Wednesday.
Some 93 of the 193 members of the UN General Assembly voted in favour of the diplomatic rebuke, which followed allegations of mass human rights abuses by Russian troops in the formerly occupied town of Bucha in northern Ukraine.