BEIJING (AP) — A group that helps Internet users in China see blocked websites says Chinese authorities are behind cyberattacks against the group's site and a U.S.-based web resource for programmers that hosts some of the group's data. The anti-censorship group Greatfire.org said in a statement Monday that their analysis shows Chinese authorities carried out denial-of-service attacks that have intermittently shut down San Francisco-based Github over the past week.