SAN FRANCISCO, (Reuters) – Google Inc said it may  pull out of China because it is no longer willing to accept  censorship of search results and after hackers coordinated a  sophisticated attack on email accounts of human rights  activists using its Gmail service.

Google’s surprise announcement yesterday came shortly  after an adviser to U.S. Secretary of State Hillary Clinton  said she will announce a technology policy next week to help  citizens in other countries to gain access to an uncensored  Internet.

More than 20 other companies were also attacked by the  China-based hackers, Google said.

Google said the hackers had tried to access the Gmail email  accounts of Chinese human rights activists but only managed to  access two unidentified accounts, and then only headlines and  other data such as when the account was created.