Leaked cockpit conversations from the Polish president's plane that crashed in 2010, killing all on board, are suggesting that the pilots were under pressure from presidential and Air Force officials to land in unfavorable conditions.

But military investigators cast doubt on the leaked material, published by Radio RMF FM on Tuesday, saying some speakers and remarks are wrongly identified in the leak.

Ahead of the April 10 anniversary of the crash, the radio station said that experts were able to identify more voices and phrases than previously after using a new technique to recover data from the cockpit voice recorder. The station did not say how it obtained the recordings.

The presidential plane crashed in dense fog near the airport in Smolensk, Russia, killing President Lech Kaczynski and 95 others.