Poland's prime minister says Russia's draft report on the causes of this year's plane crash in Russia that killed Poland's president is unacceptable.
Donald Tusk on Friday criticised some of the conclusions of a report by a Russian commission investigating the crash as unfounded and said the document shows the commission's "negligence, or mistakes, or no reaction to demands" made by the Polish side. The conclusions have not been made public.
Mr Tusk told journalists that the report in its current form "is unacceptable, without doubt."
Russian investigators made the draft report available to the Poles two months ago.
Separate Polish and Russian teams are investigating the April crash in Smolensk, Russia, that killed President Lech Kaczynski and 95 others.