Polish prosecutors: Russian air traffic controllers contributed to 2010 crash

The crash on April 10 2010 killed President Lech Kaczynski and 95 others, many of them top Polish state and military leaders.

Polish prosecutors allege that a new analysis of evidence about the 2010 plane crash in Russia that killed the Polish president shows that two Russian air traffic controllers and a third person in the control tower willingly contributed to the disaster.

National Prosecutor Marek Kuczynski said there is "no doubt" that one of the causes of the crash was the behaviour of those in the control tower but that no formal accusations have been made yet.