Polish prosecutors found traces of explosives, including TNT and nitroglycerine, on the wreck of the government plane that crashed in 2010, killing Polish President Lech Kaczynski and a number of other state officials, daily Rzeczpospolita reported today.

Traces of explosives were found both on plane chairs and on parts of wings.

The prosecutors notified attorney general on the discovery, he, in turn, notified Prime Minister Donald Tusk, Rzeczpospolita writes.

Prosecutors are still considering the possibility of the traces found to originate from World War II explosives, as Smolensk area witnessed heavy fighting at the time.

President Kaczynski was killed along with 95 others when the presidential jet crashed as it attempted to land in thick fog at Smolensk airport in western Russia on April 10, 2010.

The members of Polish delegation were on their way to a memorial for thousands of Polish officers, killed by Soviet forces in 1940.