Blogger who was target of Twitter and Facebook attacks blames Russia

Russian hackers are believed to have been behind a “single, massively coordinated attack” on some of the world’s leading websites last week — all in an effort to silence a pro-Georgian blogger.

Millions of people were locked out of Twitter and Facebook after cyber-attacks on the social networking sites on Thursday. LiveJournal, a blogging service, was also hit, although Google, the world’s most popular site, said that it was able to repel the onslaught.

Under such “denial-of-service” attacks, sites are deluged with traffic in an attempt to bring them down.