Warsaw, Jan 14 (Agencies): Poland's Prime Minister slammed a Russian report on the April air crash in Russia which killed Polish President Lech Kaczynski, but insisted it should not derail improving ties with Moscow.

"From the Polish point of view this is not a complete report," Tusk told reporters in Warsaw a day after officials in Russia presented their damning conclusions squarely blaming Polish incompetence for the crash.

"Poland will ask the Russian side for consultations to agree a common version of the report on the causes of the Smolensk catastrophe," Tusk said, insisting Polish input was needed.

"If the talks with Russia do not result in a joint declaration, it will be possible to call upon international institutions," Tusk added.

He said the crash report presented in Moscow on Thursday was riddled with "procedural faults, mistakes" and that it "unquestionably did not follow all the procedures of the Chicago Convention", a global accord which regulates air-crash probes.

Tusk, however, also stressed the Smolensk disaster should not have a negative impact on bilateral relations amid a recent warming between Warsaw and its Soviet-era master Moscow.

"This tragic catastrophe was not and does not have to be a blow to good Polish-Russian relations," he added.

Russian investigators on Thursday blamed Polish failures for the plane crash that killed Kaczynski, asserting that top officials put pressure on the inexperienced pilots to land in dangerous weather.