Hundreds of people are believed to have been killed or injured by the security forces, with more than 70 bodies brought to one hospital.

Iran protests turn more violent with 65 reportedly killed by Friday and over 2,300 arrested as authorities imposed an internet blackout amid nationwide anti-regime unrest.

Tehran threatened on Sunday to retaliate against Israel and U.S. military bases in the event of U.S. strikes on Iran, issuing the warning as Israeli sources said Israel was on high alert for the possibility of any U.

Iran is witnessing widespread nationwide protests fueled by a worsening economic crisis, as rising inflation, unemployment, and a weakening currency deepen public anger. Despite strict internet and phone shutdowns imposed by authorities,

Several Iranians who protested in Iran over the past few days have spoken to CNN about seeing enormous crowds as well as brutal violence on the streets of Tehran, with one woman saying she saw “bodies piled up on each other” in a hospital.

As activists say Iran's anti-government unrest has seen almost 120 people killed, the nation's rulers threaten protesters, and U.S. forces across the Mideast.

Protests in Iran have continued despite threats from the government to crack down. Online videos show demonstrators protesting Friday night, even after authorities shut down the internet and cut phone lines.