From the Times of London:
If Mr Ahmadinejad is declared the victor, there is a danger of violence in Tehran and other cities. On Thursday Mohammad Atrianfar, a Mousavi adviser, said that the President could win only by cheating, and predicted riots and chaos if that happened. Saeed Laylaz, a respected political consultant, said that he feared a “Tiananmen Square-style experience”, with the military crushing protests. Scuffles broke out in central Tehran last night between Mr Mousavi’s supporters and police. Several websites, including the BBC, appeared to have been blocked.