Russian President Vladimir Putin on Monday said his main spy agency had foiled what he cast as a Western plot to kill a prominent Russian journalist.
"This morning, the Federal Security Service stopped the activities of a terrorist group that planned to attack and kill one famous Russian TV journalist," Putin told prosecutors.
"They have moved to terror - to preparing the murder of our journalists," Putin said.
He did not immediately provide evidence to support his claims. Reuters was unable to immediately verify the claims.
The Interfax news agency said that members of a nationalist group had been detained by Russian authorities.
The group, acting on the orders of Ukrainian spies, was plotting to kill Russian journalist Vladimir Solovyev, they added.
Putin said the West was trying to destroy Russia from the inside but that such attempts would fail. He said the US Central Intelligence Agency was directing attempts to undermine Russia and advising the Ukrainian government.
Putin also said foreign media organisations and social media had been used by the West to confect provocations against Russia's armed forces. Such actions, he said, should be stopped.
Children across parts of the US Northeast will stay home on Monday as a powerful winter storm forced school closures and pushed offices and transit systems onto emergency schedules, with officials across the region warning of heavy snow, strong winds, and dangerous travel conditions.
One of Mexico's most notorious drug lords, Nemesio Oseguera, or "El Mencho", has been killed in a military raid on Sunday, sparking widespread retaliatory violence.
Pakistan said it launched strikes on targets in Afghanistan after blaming recent suicide bombings, including assaults during the holy month of Ramadan, on fighters it said were operating from its neighbour's territory.
One police officer was killed and 24 other people were injured after several explosive devices detonated at midnight in Lviv in western Ukraine, the National Police said on Sunday.
President Donald Trump said on Saturday he will raise a temporary tariff from 10 per cent to 15 per cent on US imports from all countries, the maximum level allowed under the law, after the US Supreme Court struck down his previous tariff programme.
The move came less than 24 hours after Trump announced a 10% across-the-board tariff on Friday after the court's decision. The ruling found the president had exceeded his authority when he imposed an array of higher rates under an economic emergency law.
The new levies are grounded in a separate but untested law, known as Section 122, that al