Two women in Iran were arrested after a man threw yoghurt on them for not fully covering their hair, in an incident captured on video.
CCTV footage showing the "yoghurt attack", is believed to have taken place in the city of Shandiz in northeast Iran and has been spreading on social media.
The video shows a man in a chequered shirt approaching one of the women who is unveiled and speaking to her while getting more and more animated.
He is then seen grabbing a pot of what is believed to be yoghurt and throwing it over the pair, which hits them in the head, before being confronted by another man and pushed out of the store.
In response to the event, Iran's President Ebrahim Raisi insisted that the hijab is the law in the country and the two women have since been arrested for not covering their hair.
The man has also been arrested for insulting the women, public disorder and "unconventional promotion of virtue".
Reports on social media say the dairy shop had been shut, but the owner was quoted by a local news agency as saying he had been allowed to reopen and was due to "give explanations" to a court.
President Raisi said: "If some people say they don't believe [in the hijab]... it's good to use persuasion...
"But the important point is that there is a legal requirement... and the hijab is today a legal matter."
Following protests in recent months, Gholamhossein Mohseni Ejei, the Chief Justice of Iran, said on Saturday: "Unveiling is tantamount to enmity with [our] values.
"Those who commit such anomalous acts will be punished and will be prosecuted without mercy."
Growing numbers of women have defied authorities by discarding their veils after nationwide protests, which came after Mahsa Amini was beaten to death by the country's morality police while in custody.
Politician and Cultural Commission member Hojjat ol-Eslam Hossein Jalali, said over the weekend that those found guilty of not wearing a hijab could have their everyday freedoms stripped, including having their driving licenses and passports taken.
Jalali said there would be no change in the way hijab and chastity laws were enforced, but that methods of imposing the ultra-conservative rules would be less violent from now on.
"Moving away from the hijab means a retreat of the Islamic republic," Jalali added.
The uproar after the months-long anti-hijab protests that started in September has led politicians to find alternative ways of enforcing the hijab law.
Before the protests, those who broke the law would be slapped with a small fine. However, if they had previous offences they could be physically beaten with lashings.
