Multiple sources told Iran International that patrols and checkpoints were ubiquitous, with increased police and military deployments across urban centers, particularly in major cities.
In Tehran, daily life has slowed markedly, with many shops closed and streets quieter than usual.
Residents said movement, communications, healthcare activity, and access to educational institutions are under tight government control, describing the capital as subdued and tense, with people avoiding unnecessary travel or gatherings.
"It's like a de facto curfew," one Tehran resident said.
In Karaj, residents said that because of the dense presence of security forces, people cannot even speak comfortably with one another. Similar conditions have been reported in multiple parts of the country.
The expanded security footprint follows what rights groups and media outlets describe as a bloody crackdown on the protests.