LATEST PICTURES - Riot police line the streets of Tehran

Thousands of riot police are said to be lining the streets of Iran as further protests begin in Tehran. Defying Ayatollah Khamenei's calls for an end to the demonstrations and his warnings of a tough response to them, hundreds of thousands of Iranians are expected to congregate on the streets of the capital. Today will be the 7th day of protests across the country which were sparked by last Friday's election. So far 8 protestors have been killed and many fear that today's protests will turn violent.