Data from Russian investigations into a...

"At the moment the state commission investigating the causes of the crash is discussing handing over to the Polish side all the materials, including the records of the plane"s flight recorders," Yuri Chaika said, adding that all necessary international legal documents were being drawn up.

Kaczynski, his wife, and a delegation of senior Polish officials died when their plane crashed near the west Russian town of Smolensk on April 10. They were on their way to a ceremony to pay tribute to some 20,000 Polish officers murdered by Soviet secret police in the Katyn massacre.

There were 96 people on board the plane, including 8 crewmembers. No one survived.

MOSCOW, May 6 (RIA Novosti)