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A fresh probe into the deadly 2010 crash of a Polish presidential jet in Russia suggested that an explosion likely caused the aircraft to break up in the air, investigators said on Monday.
The commission of inquiry 'considers the possibility of an explosion to be quite likely', said the narrator of a video prepared by the investigative body, and shown to reporters.
'In light of the experiments conducted (by the commission), we can say that the most likely cause of the explosion was a thermobaric load that set off a strong shockwave,' the narrator said.
The claim comes on seventh anniversary of the crash in Smolensk, western Russia, that killed Polish President Lech Kaczynski and 95 others, mostly senior Polish statesmen.