Story highlights Russian Defense Ministry spokesman: Allegations designed to attract sympathy Ukraine, West have long accused Russia of sending troops, supplies into eastern Ukraine Ukraine's Prime Minister made latest such allegation on Monday
A day earlier, Ukrainian Prime Minister Arseniy Yatsenyuk said Russian troops had crossed the border to support pro-Russian rebels.
Ukraine and the West for months have accused Russia of supporting rebels in eastern Ukraine by sending in Russian troops, weapons and supplies. The United States and European countries have imposed economic sanctions on Russia over its involvement in Ukraine, while Russian officials have frequently denied claims their military has sent forces to bolster the rebels.
On Tuesday, Russian Defense Ministry spokesman Maj. Gen. Igor Konashenkov said Monday's allegations were designed to attract sympathy and investment for Ukraine at this week's gathering of political and business leaders in Davos, Switzerland.
Yatsenyuk, according to Ukraine's state-run media, said Monday that his country's military "confirmed the fact military personnel and equipment have been transferred from Russia to Ukraine."
"Tanks, GRAD multiple rocket systems, BUK and SMERCH systems, radio electronic intelligence systems are not sold at local Donetsk street markets. Only the Russian army and Defense Ministry have them," Yatsenyuk said.
The prime minister's spokeswoman, Olga Lappo, confirmed to CNN the quotes attributed to Yatsenyuk are accurate.
Unrest in Ukraine began with protests in the country's capital last year after pro-Moscow President Viktor Yanukovych, favoring closer ties to Russia, dropped plans to sign a political and economic agreement with the European Union.
After months of protests and days of deadly clashes between demonstrators and security personnel in Kiev, Parliament ousted Yanukovych in February. Weeks later, Russia annexed the Crimean Peninsula.
In April, violence broke out in two Ukrainian regions that border Russia -- Donetsk and Luhansk -- as separatist leaders declared independence from the government in Kiev.
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Claims that Russian forces entered Ukraine 'complete ...