The search engine shut down its its censored search results offered through Google.cn, so users who visited that address were instead redirected to Google.com.hk, which offers unfiltered results in Chinese.
As recently as last month China was still not blocking Google searches in the country, except politically charged queries such as the "Tiananmen Square Incident."
Thursday that changed. Google says people in mainland China were being blocked from using its Internet search engine.
The company posted a Thursday notice about the new barrier without any other details. A Google representative didn't immediately return a phone message. But later it was reported that Google overestimated the problem.