A Kiev hotel earlier this week cancelled a showing of the Russian-made documentary "War 08.08.08. The Art of Betrayal", which Ukraine described as anti-Ukrainian propaganda.

Russia's Foreign Ministry said Ukraine's decision to stop the film was an attempt to conceal Kiev's support for Georgia in the five-day war fought over the breakaway Georgian region of South Ossetia.

The accusations come barely a week after a row over Russian television channels broadcasting in Ukraine and adds to disputes over gas supplies, the presence of Russia's Black Sea Fleet and Kiev's drive to join NATO.

"It appears that the Ukrainian authorities are trying under various pretexts to conceal the truth about the real events around South Ossetia and the Ukrainian side's involvement in them," the Russian Foreign Ministry statement said.

The Kiev hotel which planned to show the film said it had cancelled it for security reasons.

A statement from Ukraine's SBU security service said the film was Russian propaganda and that it had warned Ukrainian parliamentarian Valery Konovalyuk against showing it.

"He was warned about his responsibility for disseminating unproved, untrue information prepared by the Russian secret services on the basis of manufactured myths," the statement said.

Ukraine's President Viktor Yushchenko flew to Tbilisi on Aug. 13, a few days after hostilities broke out in Georgia, and openly supported the Georgian president just after the two sides had signed a ceasefire deal.

Georgia and Ukraine want to join both NATO and the European Union, moves which angers Russia.