The scientists, who belong to the Tunguska space phenomenon public state fund, said they found the remains of an extra-terrestrial device that allegedly crashed near the Tunguska river in Siberia in 1908.
They also claim to have discovered a 50-kilogram (110-pound) rock which they have sent to the Siberian city of Krasnoyarsk for analysis.
The Tunguska blast, in a desolate part of Siberia, remains one of the 20th century's biggest scientific mysteries.
On June 30, 1908, what is widely believed to be a meteorite exploded a few kilometers above the Tunguska river, in a blast that was felt hundreds of kilometers (miles) away and devastated over 2,000 square kilometers of Siberian forest.
But the exact nature of the body that exploded and its origin remain a mystery which has spurred countless theories and controversies.