Russia on Monday handed over crucial flight data records of President Lech Kaczynski's plane to Poland and expressed readiness to share additional information to clarify the causes of the air crash in which 96 people were killed last month.
"Russia is ready to hand over other data related to the investigation into the crash of Tu-154," Vice Premier Sergei Ivanov said at his meeting in Moscow with Polish Interior Minister Ezhi Miller.
The Polish presidential Tupolev Tu-154 aircraft crashed on April 10 while landing in bad weather at Russia's Smolensk airfield killing 96 people, including President Kaczynski, his wife and top military and political leaders of the country.
Ivanov and Miller signed a memorandum on the transfer of attested copies of ill-fated aircraft's black box recordings. However, the black boxes will remain with the Interstate Aviation Committee (IAC) of CIS till the end of probe.
"The transfer of copies of all the data does not mean the conclusion of probe. The work of competent bodies of our two countries will continue," Ivanov was quoted as saying by official ITAR-TASS news agency.
Russian and Polish investigators and experts are jointly investigating the causes of the crash.
Polish military prosecutors are also conducting their own separate investigation.
Earlier, head of the committee, Tatiana Anodina, had said that two "unauthorised" persons were in the cockpit at the time of crash.
Later the Polish media had said the "two unauthorised" persons were Polish Air Chief and Chief of Protocol of the President.
Ivanov clarified that the copies handed over to Poland comprise of the data of the technical commission of IAC and the Polish investigators had access to them from the beginning.