Tehran, Jan. 15 -- Short of formally declaring a national emerency, Iranian authorities sharply expanded the deployment of security forces across major cities, tightening control in an effort to suppress further unrest.

In the capital, residents said movement, communications, healthcare activity and access to schools and universities are all under close government supervision.

"It's like a de facto curfew," one Tehran resident said, describing a tense atmosphere in which people avoid unnecessary travel or public gatherings.

As per sources in Iran International, heavily armed patrols, military checkpoints and the general presence of security personnel in standard residential zones have now become a virtual norm in urban centres, particula...