A spokesman for Moscow-based antivirus company Kaspersky Lab said the company is not commenting on reports that the son of Chief Executive Eugene Kaspersky has been kidnapped.

"We don't have any information to share at the moment. I'll let you know if that changes," the spokesman said in an e-mail to CNET today.

Ivan Kaspersky, 20, was reportedly 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, which cites Russian language site LifeNews. Later that day, someone called the father on the phone and demanded $4.3 million, the report says.

The younger Kaspersky is a fourth-year student of mathematics and cybernetics at Moscow State University.