Wall Street Journal: Early Tuesday, hackers temporarily shut down Baidu, the top search engine in China. Those who tried to access the site found a banner for the Iranian Cyber Army instead of the usual Web site graphics. A group also calling itself the Iranian Cyber Army attacked Twitter last month. While Twitter seemed a logical target for an Iranian group, analysts aren't sure why such a group would want to target Baidu.
In a statement, Baidu said "Services on Baidu's main website www.baidu.com were interrupted today due to external manipulation of its DNS (Domain Name Server) in the U.S. Baidu has been resolving this issue and the majority of services have been restored."