The 20-year-old son of Russia's one of the richest software moguls has been abducted and his abductors are demanding a ransom of three million euro.

Ivan Kaspersky, 20, son of computer security software giant Kaspersky Lab owner Yevgeny Kaspersky was kidnapped on April 19, according to web-based Life.ru news portal.

It said Kaspersky senior was in London, where he received a phone call from abductors, who asked for 3 million euro ransom.

The business tycoon flew to Moscow soon after and the matter has been kept top secret to protect the security of Ivan Kaspersky.