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This would help prevent "resistance against the hijab law"....
Iranian authorities have started installing cameras in public places to identify unveiled women, the police have announced.
If any woman seen not wearing hijab and revealing their hair "warning text message will be sent" police said.
This would help prevent "resistance against the hijab law", police said.
Last year protests were held by the death in police custody of Masha Amini, young Kurdish woman allegedly violating the hijab rule.
Since Ms Amini's death a growing number of women have been discarding their veils, particularly in larger cities, despite the risk of arrest.
Since the 1979 Islamic Revolution installed, women have been legally required to cover their hair with a hijab (headscarf). Who violate the law face fines and arrest.
Saturday's police statement described the veil as "one of the civilizational foundations of the Iranian nation" and urged business owners to uphold the rules through "diligent inspections".
A video was viral last week, in which a man was seen throwing yoghurt on two unveiled women were arrested under the hijab law and the man was also arrested.
Thousands of protesters in Iran have been arrested and four have been executed since December, but hardliners have continued to insist that more be done to enforce the law.
Last Saturday, Iranian President Ebrahim Raisi reiterated that Iranian women must wear the hijab as a "religious necessity".
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