"The Russian Federation complies fully with its obligations under (the) treaties that are now relied upon by Ukraine," in a case before the UN's top International Court of Justice, Moscow's representative said.
"We see neither a legal nor factual basis" for the measures asked for by Ukraine, Roman Kolodkin, legal director at Russia's foreign ministry, told the court in The Hague.
Ukraine yesterday urged the ICJ to order emergency measures to bring stability to its eastern regions.
Ukraine lodged its case against its former Soviet master at the ICJ in mid-January, saying it had protested for several years against Moscow's alleged financing of separatist rebels battling Ukrainian government forces.
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Ukranian deputy foreign minister Olena Zerkal told judges that Kiev was only seeking "a measure of stability and calm in an unpredictable and dangerous situation."
But Ilya Rogachev, another Russian representative, told the 16 judges hearing the case that Kiev "is misleading the court."
Kiev "is involved in an armed conflict being waged by its authorities and its armed forces including irregular battalions against the people of the eastern Ukraine," Rogachev said.
"Stigmatising those as terrorists and sponsors of terrorism could have serious consequences" in future peace talks, he warned.
"Ukraine's own evidence, which shows that it is at least equally engaged in indiscriminate shelling, places a very important question mark next to the characterisation that Ukraine alone places on these acts as acts of terrorism," added one of Russia's lawyers, Samuel Wordsworth.