The body of Polish President Lech Kaczynski...

Speaking from the scene of the clean-up operation, the source said however that "additional tests, including DNA," would be needed to identify many of the bodies.

All 97 people on board died when a plane carrying Kaczynski, his wife, and a delegation of senior officials crashed in thick fog while attempting to land at Smolensk airport.

Kaczynski was on his way to a ceremony in nearby Katyn to commemorate the memory of some 20,000 Polish officers killed by Soviet secret police during World War Two.

MOSCOW, April 10 (RIA Novosti)