Despite a slackening of street activity in the face of a brutal crackdown, Iranian protesters are still challenging the Islamic theocratic regime four months into their movement, observers say.

There have been fewer daily street protests nationwide since November as the authorities seek to quell the protests with methods including capital punishment, which has already seen four protest-related executions.

But the anger unleashed by the death in mid-September of Mahsa Amini, who had been arrested for violating the Islamic Republic's strict dress rules, has not subsided and at a time of economic crisis still poses a potential threat to the Iranian regime.