Iranians took to the streets on the evening of Thursday, following a call from Reza Pahlavi, the exiled son of Iran's last shah, and from Kurdish political parties. Turnout was massive in major cities.

Videos show that unrest has spread to more than 50 towns and cities, including pro-government heartlands.

Amnesty International says security forces' raid on hospital in Ilam to seize protesters violates international law.

Nationwide internet blackout as unrest spreads to more cities