The LiveJournal blogging site, hugely popular in Russia, on Wednesday fell victim to a major cyber attack that bloggers said appeared an attempt to to silence political discussion ahead of elections.
The attack, which began earlier this week, was a so-called distributed denial of service (DDoS), which overloads a website's bandwidth by making thousands of computers access it repeatedly, its owner said.
SUP, the company that now owns LiveJournal, has said the recent series of attacks are the worst in the service's history and have started to target the entire service rather than specific blogs.
"Somebody really wants LiveJournal to cease to exist" and its popular users to switch to standalone platforms that are easier to destroy, wrote SUP's development manager Ilya Dronov on his blog after the site was offline for several hours on Monday.
The problem started with DDoS attacks on Alexei Navalny, who has used his blog to talk about corruption in the government and the ruling United Russia party, said Maria Garnayeva, an expert at Internet security company Kaspersky Lab, who posted information about the attack on her blog.
Navalny started targeting United Russia earlier this year calling them "the party of swindlers and thieves" which turned into an Internet meme. Shortly after, spammers started inundating all of his posts with derogatory comments.
Many bloggers said the attacks are most likely orchestrated by the authorities through Nashi, a pro-Kremlin movement believed to act on the orders of influential Kremlin advisor Vladislav Surkov.