7:42 PM ET -- Rights group: Injured demonstrators arrested at hospitals. "Numerous Iranians beaten and injured by security forces as they tried to stage peaceful demonstrations have been arrested and detained when they sought medical treatment in hospitals," the International Campaign for Human Rights in Iran reported today.

"The arrest of citizens seeking care for wounds suffered at the hands of security forces when they attempted to exercise rights guaranteed under their own constitution and international law is deplorable," said Hadi Ghaemi, spokesperson for the Campaign. "It can only be taken as a sign of profound disrespect by the state for the well-being of its own people."

Additionally, the Campaign said it had "learned that communications out of Tehran's Evin prison have been cut off. Evin prison is where many of Iran's long-term political prisoners and a number of intellectuals, opposition politicians, human rights activists and journalists detained over the past several days are incarcerated.”