BBC o Smoleńsku [ENG]

Military prosecutors in Poland deny explosive traces were found on the jet which crashed in Russia two years ago, killing President Lech Kaczynski and 95 others.

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However, Col Szelag told a news conference later on Tuesday: "It is not true that investigators found traces of TNT or nitroglycerine.

"Evidence and opinions collected so far have in no way provided support to the belief that the crash was a result of actions by third parties, that is to say an assassination."

He also pointed out that equipment used to detect TNT could react in a similar way to soil,