Iranian riot and plainclothes policemen detain a man during protests in central Tehran November 4, 2009. Tens of thousands of Iranians held demonstrations on Wednesday across the country to mark the 30th anniversary of the seizure of the U.S. embassy in Tehran by Iranian students. In Tehran, the demonstrators gathered outside the former U.S. embassy in central Tehran, carrying placards expressing their hatred of the "arrogant powers" and shouting anti-U.S. and anti- Israel slogans. [Chinadaily.com.cn via agencies]