MOSCOW (AFP) - Russian President Vladimir Putin on Thursday called the Internet a "CIA project" and warned Russians against making Google searches.

Putin assured a group of young journalists that the Internet was controlled from the start by the CIA and its surveillance continues today.

"That's life. That's how it's organised by Americans. You know all of this started during the dawn of the Internet as a special project of the CIA. And it keeps on developing," Putin said in televised comments.

Responding to questions from a young pro-Kremlin blogger, Putin warned that information entered on Google "all goes through servers that are in the States, everything is monitored there".

He also made ominous comments on Russia's most popular search engine Yandex, suggesting it could become more tightly controlled.

Yandex is "partly registered abroad and not just for tax reasons, but for other reasons too", Putin said, mentioning it is partly owned by international investors and reiterating his fear of foreign control of the Internet.

When Yandex was starting out, Putin said, they were "pressured" to have "that many Americans and this many Europeans among the executives".

"We must fight determinedly for our own interests. This process is happening. And we will support it from the government side, of course," he said without explaining what he means in detail.

Yandex handles some 60 per cent of search queries in Russia and has a presence in several other countries. It allows users to search blogs and rates the most popular entries.

Yandex's shares fell over 4.3 per cent on the NASDAQ after Putin's comments.

The company said in a statement quoted by news agencies that registration abroad is not done to dodge taxes but due to issues of corporate law, while foreign investment is a common feature of any Internet startup.

"Since our main business is in Russia, we pay almost all taxes in Russia," Yandex said.

While the Internet remains the main sphere for political discussion, Russia has recently cracked down on debate, with a new law allowing the government to block blacklisted sites without a court order.

Opposition leader Alexei Navalny had his popular blog blocked and a widely read news site that covered opposition causes sacked its long-term editor and changed its stance after a warning on extremism from the state watchdog.

Russia this week passed in its initial stage new legislation that would force popular bloggers to register their sites and comply with similar regulations as mass media.

The 61-year-old president has frequently been scathing about the Internet, which he once described as "half pornography", unlike Prime Minister Dmitry Medvedev, who posts snaps on Twitter.

Putin's spokesman Dmitry Peskov insisted this month that the president is a regular Internet user and even sometimes laughs at jokey Photoshopped images.