For the second time in a year, China has blocked Google’s YouTube service, although Chinese authorities won’t give any details as to why. “Many people have a false impression that the Chinese government fears the Internet. In fact, it is just the opposite,” a Foreign Ministry spokesman told Reuters. The spokesman said he didn’t know that the service was being blocked. China most recently restricted access to YouTube a year ago, when videos of clashes between police and protesters in Tibet surfaced on the site. According to various reports, a video showing Chinese police beating Tibetans was posted by a Tibetan exile group last week. China requires online video broadcasters to report and delete videos that hurt the country’s reputation or disrupt social stability.

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Update: YouTube says it doesn’t know what’s going on either. “YouTube has been blocked in China since yesterday,” a spokesman says in an e-mail. “We do not know the reason for the blockage, and we’re working as quickly as possible to restore access to our users in China.”