The kidnapped son of Kaspersky Lab's founder has been freed and five suspects are in custody in connection with the abduction, according to a Russian media report today.

Russian law enforcement officials freed Ivan Kaspersky, the 20-year-old son of Chief Executive Eugene Kaspersky, through a special operation with company security forces, according to the Interfax news agency.

"He has been freed without ransom," a spokeswoman for the Moscow-based antivirus company told the news agency.

The younger Kaspersky, a fourth-year student of mathematics and cybernetics at Moscow State University, was kidnapped Tuesday morning on his way to work at InfoWatch, a company owned by his mother, Natalya Kaspersky, according to the English version of Pravda.ru. Someone claiming to be his abductor later reportedly phoned the father and demanded $4.3 million.

No further information about the suspects was available, and Kaspersky representatives did not immediately respond to a request for comment.