Google: We believe state-sponsored attackers may be attempting to compromise your account or computer. Google: If you see this warning it does not necessarily mean that your account has been hijacked. Google wouldn’t explain how Google knows when you’re under attack. Google has been sensitive to attacks by nation-states on its systems. In December 2010, Google said China was the culprit behind an attack on Gmail, this time through a spear phishing campaign that included high-ranking U.S. government officials.”]