Polish investigators are to analyse the plane’s black boxes to see whether there is any truth in suggestions that pressure was put on the pilots to land in bad weather.
In 2008 there were reports that President Kaczynski ordered a pilot to land in Tbilisi during Georgia’s war with Russia.
Poland’s chief prosecutor Andrzej Seremet has said there is no evidence at the moment of similar pressure.
“In the inquiry we’ll work out an opinion based on the sound recordings to listen to was said in the background of the conversations in the plane,” he said. “We want to know if there was pressure put on the pilot by third parties. We must establish all the circumstances.”
Russia has said the pilot ignored advice from air traffic controllers not to land at Smolensk. The delegation was on its way there to commemorate the massacre of Poles at Katyn during World War II.
In Moscow relatives of the victims have begun identifying the bodies. That of the President’s wife Maria, identified thanks to an engraved ring, is expected to be flown home today. The identification process is expected to last three to four days.