Facebook, a social networking site with the largest number of users worldwide, said Tuesday

According to foreign media reports, Facebook, the largest social networking site in the world, said in Tuesday that it was investigating a number of Facebook user accounts that were appearing frequently this week in pornographic violence videos and pictures.

Pictures, web links and videos depicting pornography and violence have appeared on Facebook users ' newsfeed pages several times recently.

Andrew Noyes, a Facebook spokesman, wrote in ane-mail statement to Reuters: "There has been a recent press report on the matter, and we are investigating and dealing with it noyce." ”

"One important part of our service is to protect Facebook users from spam and viral content," says Noyce. We are constantly upgrading our service systems to isolate and delete content that violates Facebook's publishing regulations. ”

Paul Ferguson, an Internet security expert, points out that Facebook and other Web 2.0 sites are very easy targets for such cyber attacks because they get a lot of content from external sources every day.

"It appears that Facebook is facing a new round of cyber attacks every two or three days," Ferguson said. This has become a new feature of Web 2.0 Web sites and social networking sites that have become an easy target for hackers to achieve (low-hanging fruit). ”