The Ukrainian Territorial Defence Forces take part in a military drill outside Kyiv. File/AFP

The Ukrainian military said on Wednesday one soldier had been killed and six wounded in shelling by pro-Russian separatists in east Ukraine in the past 24 hours as ceasefire violations remain at a high level.

The military said on its Facebook page it had recorded 96 incidents of shelling by separatists over the past 24 hours compared with 84 a day earlier. It said separatist forces used heavy artillery, mortars and Grad rocket systems.

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Ukraine has accused Russia of provoking violence, saying it used it as a pretext to formally recognise eastern Ukraine as independent and move its troops into the region, precipitating a crisis that the West fears could unleash a major war.

Russian President Vladimir Putin said on Wednesday that Moscow was ready to look for "diplomatic solutions" amid raging tensions with the West over Ukraine but stressed that the country's interests were non-negotiable.

"Our country is always open for direct and honest dialogue, for the search for diplomatic solutions to the most complex problems," Putin said in a video address to mark the Defender of the Fatherland Day, a public holiday in Russia.

But he added: "The interests of Russia, the security of our citizens, are non-negotiable for us."

Putin spoke after parliament's upper house, the Federation Council, on Tuesday gave him unanimous approval to deploy "peacekeepers" to two breakaway Ukrainian regions now recognised by Moscow as independent, and potentially into other parts of Ukraine.