NEW : Facebook has used browsers to spread porn , violent images . NEW : The site says most of the offensive content has been removed . Members of hacker collective Anonymous claim they used a virus to attack Facebook . Facebook : No data or account information was used in the attack .
NEW : Facebook hack exploited browsers to spread porn , violent images . NEW : The site says most of the offensive material has been removed . Members of hacker collective Anonymous claim they created a virus to attack Facebook . Facebook : No data or account information was compromised in the attack .