Russia recalled its ambassador to NATO for consultations Thursday, two days after NATO member countries suspended cooperation with Russia over the Ukraine crisis, Russian state media reported.
Col. Gen. Valery Yevnevich will return to Moscow in light of NATO's actions, official news agency ITAR-Tass said, citing Russian Deputy Defence Minister Anatoly Antonov's remarks to journalists.
"The policy of (deliberately) whipping up tensions is not our choice. Nonetheless, we see no possibility to continue military cooperation with NATO in a routine regime," Antonov is quoted as saying.
He accused NATO Secretary General Anders Fogh Rasmussen of making "confrontational statements" at the meeting of NATO foreign ministers early this week and questioned NATO steps to bolster its presence in Eastern Europe.
Earlier, Russian Foreign Minister Sergey Lavrov also said Moscow wanted answers from NATO regarding activities in Eastern Europe after the Western military alliance said it would step up defenses for its eastern members.
Russia's move to annex the Crimea region from Ukraine last month has sparked the worst East-West crisis since the Cold War and raised fears among its Eastern European neighbors.
At their meeting, NATO foreign ministers decided the alliance would draw up plans for reinforcing NATO's defenses following Moscow's annexation of Ukraine's Crimea region -- which the West deems illegal.
These would possibly include measures such as sending NATO soldiers and equipment to allies in Eastern Europe, holding more exercises and ensuring NATO's rapid-reaction force could deploy more quickly, a NATO official said. It could also include a possible review of NATO's military plans.
"We have posed these questions to the North Atlantic Alliance. We are expecting not just any answer but an answer fully respectful of the rules we have coordinated," Lavrov told a joint news briefing with his Kazakh counterpart.
Responding to criticism from Kiev and the West over the presence of Russian troops along the border with Ukraine, Lavrov said Russia had the right to move forces on its territory and said they would return to their permanent bases after completing military exercises.
"Russian troops in the Rostov region will return to their bases after completing military exercises," he said, referring to an area near the Ukrainian border.
NATO's military chief warned Wednesday that Russian troops could begin moving on Ukraine within 12 hours of being given an order. Gen. Philip Breedlove, NATO's supreme allied commander Europe, also said that with 40,000 troops massed near the border, Russia has all the components necessary to move on Ukraine.
Report: Yanukovych implicated in killings
In Ukraine, a newly released report said the killings of protesters in the Ukrainian capital during anti-government demonstrations in February took place under the order of ousted President Viktor Yanukovych.
The preliminary report by the Ukrainian government implicated pro-Moscow Yanukovych in the covert planning of a series of sniper attacks in Kiev, backed by Russia, during the rallies that eventually led him to flee across the border.
Presenting the findings at a news conference, Interior Minister Arsen Avakov said evidence showed Yanukovych had directly ordered snipers to open fire on protesters. Yanukovych, now in Russia, has denied personal responsibility for the bloodshed.
Twelve members of the feared Berkut special security forces have been detained as part of the investigation, Prosecutor General Oleh Makhnytsky announced.
The inquiry looked into the shootings on Instytutska Street in Kiev, where dozens were killed on February 18-20. Around 100 people are now known to have died in Ukraine since the unrest began in November following Yanukovych's last-minute U-turn over a deal with the European Union in favor of closer ties with Russia.
The new government in Kiev has since signed the political part of the association agreement with the EU.
The report also said Russian Federal Security Service operatives had been involved in planning operations against the protesters.Ukrainian Security Service chief Valentyn Nalyvaychenko said the Russian agency had sent "tons" of explosives and weapons by plane to Ukraine.
Moscow has claimed far-right protesters were behind the shootings in an effort to stir up anger against Yanukovych.
Gas price hike
Meanwhile, the head of Russia's top natural gas producer, Gazprom, said it would further increase the gas price for Ukraine to $485 per 1,000 cubic meters as of April, ITAR-Tass quoted him as saying.
Gazprom Chief Executive Alexei Miller said the price would increase during a meeting with Russian Prime Minister Dmitry Medvedev, who urged Ukraine to pay off its gas debts.
The increase came two days after Gazprom announced a 44% hike in the gas price for Ukraine, starting April 1, to $385.50 per 1,000 cubic meters due to the unpaid bills.
Ukraine also owes $2.2 billion in unpaid natural gas bills, Miller said during his meeting with Medvedev, according to a statement issued by the Prime Minister's office.
"Hopefully, in the near future, Ukraine will start repaying its debts and will finance its ongoing supplies; however, we see that the situation is not improving, and is only getting worse," Miller is quoted as saying.
Europe and the United States are working together to reduce Ukraine's reliance on Russian energy by developing alternative sources of natural gas, U.S. Secretary of State John Kerry said this week.