LONDON (Reuters) -Russia's foreign spy chief accused the United States and Poland on Thursday of plotting to gain a sphere of influence in Ukraine, a claim denied by Warsaw as disinformation aimed at sowing distrust among Kyiv's supporters.
Sergei Naryshkin, the chief of Russia's Foreign Intelligence Service (SVR), cited unpublished intelligence that he said showed the United States and Poland, NATO allies, were plotting to restore Polish control over part of western Ukraine.
"According to the intelligence received by Russia's Foreign Intelligence Service, Washington and Warsaw are working on plans to establish Poland's tight military and political control over its historical possessions in Ukraine," Naryshkin said in a rare statement released by the SVR.
Poland denied the claim and said it was disinformation spread by Moscow.
"The lies about Poland's alleged plans to attack western Ukraine have been repeated for several years," said Stanislaw Zaryn, spokesman for Poland's special services coordinator.
"The aim of Russian propaganda is to foster distrust between Ukraine and Poland, to undermine PL-UA cooperation."
Poland has ruled some territories that are now part of Ukraine at different times in the past, most recently between the two world wars. Western Ukraine, including the city of Lviv, were absorbed into the Soviet Union at the end of World War Two.
The SVR said the United States was discussing with Poland a plan under which Polish "peacekeeping" forces without a NATO mandate would enter parts of western Ukraine where the chance of a confrontation with Russian forces was low.
The SVR, which after the 1991 fall of the Soviet Union took on most of the Soviet-era KGB's foreign spying responsibilities, did not publish its evidence, and Reuters was unable to verify the accusation.
Poland is one of Ukraine's strongest supporters in its resistance to Russia's invasion, sending weapons across the border and taking in around three million Ukrainian refugees.
A senior Russian lawmaker, Senator Andrei Klimov, deputy chair of the Federation Council's Foreign Affairs Committee, also said on Thursday that Poland was planning to establish control over part of Ukraine. He gave no evidence for the claim.
Russia has been signaling for days that the conflict could end with a forced partition of Ukraine.
One of Russian President Vladimir Putin's closest allies said this week that Ukraine was spiraling toward a collapse into several states because of what he cast as a U.S. attempt to use Kyiv to undermine Russia.
Russia calls its actions in Ukraine a "special operation" to disarm Ukraine and protect it from fascists. Ukraine and the West says this a false pretext for an unprovoked war of aggression by Putin.
(Reporting by Guy FaulconbridgeEditing by Gareth Jones and Bill Berkrot)