BEIJING  Google’s declaration that it would stop cooperating with Chinese Internet censorship and consider shutting down its operations in China ricocheted around the world on Wednesday. But in China itself, the news was heavily censored.

Some big Chinese news portals initially carried a short dispatch on Google’s announcement, but that account soon tumbled from the headlines, and later reports omitted Google’s references to “free speech” and “surveillance.”

The only government response came later in the day from Xinhua, the official news agency, which ran a brief item quoting an anonymous official who was “seeking more information on Google’s statement that it could quit China.”

Google linked its decision to sophisticated cyberattacks on its computer systems that it suspected originated in China and that were aimed, at least in part, at the Gmail accounts of Chinese human rights activists.