Microsoft Corp. said access to its Bing search engine in China had been restored Thursday after a two-day disruption.

"We can confirm that Bing was inaccessible in China, but service is now restored," Microsoft told Fox News in a statement.

It wasn’t immediately clear why the search engine was unavailable or whether the ruling Communist Party played a role in its inaccessibility. China heavily censors the internet and operates a firewall that blocks many foreign websites like Google and Facebook.

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Bing is the last major U.S. search engine available in the country.