The son of Russian entrepreneur Yevgeny Kaspersky has reportedly been kidnapped in Moscow.
Secret service officers are said to have been searching for 20-year-old Ivan Kaspersky since he went missing on his way to work earlier this week.
Local media say a three million euro ransom has been demanded for his release. The Kaspersky family would not confirm or deny the reports.
Yevgeny Kaspersky made his money developing anti-virus software.