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Vladimir Putin has thanked Donald Trump for intelligence that helped avert “acts of terrorism” in Russia , the Kremlin has said.
The Russian president spoke to his US counterpart on the phone on Sunday, and thanked Mr Trump for the information which came via US intelligence services.
No further details were provided, however Russian media later reported the discovery of a plan to attack St Petersburg over the New Year period.
News agency Tass quoted a spokesman for the FSB, the Russian intelligence agency, as saying that two Russian nationals have been held over a plan to attack a mass gathering.
Mr Putin and Mr Trump have spoken by telephone on several occasions - with records showing Syria , nuclear agreements, trade and North Korea are among the topics discussed.
Vladimir Putin: A decade of photo-ops for Russia's man of steelShow all 21 1 /21Vladimir Putin: A decade of photo-ops for Russia's man of steel Vladimir Putin: A decade of photo-ops for Russia's man of steel Vladimir Putin, left, arm wrestles with Yulia Beganova 24 June, 2000 near Kazan, Tatarstan during celebrations for the local Sabantuy holiday
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Russia's Prime Minister Vladimir Putin takes part in a judo training session at a sports complex in St Petersburg on 22 December 2010
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin holds a tommy gun during a visit to Izhevsk Mechanical Works, a weapons manufacturer in May 2010
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin plays with his dogs Buffy (L) and Yume at his residence in Novo-Ogariovo in March 2013
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin wears a helmet and the uniform of the Renault Formula One team before driving a F1 race car on a special track in Leningrad region outside St. Petersburg on in November 2010
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin sports a pair of goggles during a visit to the Technology Park of the Novosibirsk Academic Town in February 2012
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin holds a huge pike fish, after he caught it in the Tyva on 26 July 2013
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin inspects a horse in the Karatash area, near the town of Abakan in March 2010
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin looks down the sight of a replica kalashnikov rifle at a target range in Moscow in April 2012
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin works out at a gym at the Bocharov Ruchei state residence in Sochi on 30 August 2015
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin drives down a highway in St Petersburg in August 2013
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin takes part in a judo training session at the Moscow sports complex in St Petersburg, on 22 December 2010.
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin speaks with Leonardo DiCaprio on 23 November 2010 after a concert to mark the International Tiger Conservation Forum in St Petersburg
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin holds two ancient amphorae he found while scuba diving in Taman Bay as he visits an underwater archaeological site at Phanagoria on 10 August 2011
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin caresses a Persian leopard cub as he visits the Persian leopard breeding and rehabilitation centre in the Black Sea resort of Sochi on 4 February 2014
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin rides a train in Moscow on 21 November 2019
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin hunts fish in southern Siberia in August 2017
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Russian President Vladimir Putin plunges into the icy waters of lake Seliger during the celebration of the Epiphany holiday in Russia's Tver region in January 2018
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin measures a dead polar bear on the island Alexandra Land, part of the Franz Josef Land archipalego in the Arctic Ocean in April 2010
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin sits inside a T-90AM tank during a visit to an arms exhibition in the Urals town of Nizhny Tagil in September 2011
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Vladimir Putin: A decade of photo-ops for Russia's man of steel Putin holds a Bulgarian sheperd dog given to him by his Bulgarian counterpart Boyko Borisov after their press conference in Sofia on 13 November 2010
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Back in December 2017 Mr Putin thanked the US president for information that helped halt another plot targeting St Petersburg.
The Kremlin said that both leaders have agreed to continue bilateral cooperation in order to tackle terrorism.
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