Iran's top communications official has suggested that negotiations have begun that could lead to the unblocking of Twitter. But while the social-networking site has been heavily filtered to prevent access in the Islamic republic for years, it has hardly been ignored by some of the country's highest-ranking authorities.
Twitter was not a hugely popular networking tool when it was blocked in 2009 amid massive protests over the reelection of President Mahmud Ahmadinejad.
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