A young Iranian couple have been arrested after a marriage proposal in public that was captured on a video clip that went viral on social media. The police say the pair offended Islamic mores on public decency but were later released on bail.

The video, which spread on social media on Friday, shows the young man standing in a heart-shaped ring of flower petals next to colourful balloons in a shopping mall in the central Iranian city of Arak.

📹 Man publicly proposes to woman at shopping mall in Arak, central #Iran

Both arrested for "marriage proposal in contradiction to islamic rituals... based on decadent Western culture," then released on bail pic.twitter.com/eKdlNX9Bte — Sobhan Hassanvand (@Hassanvand) March 8, 2019

He proposes, and after the young woman says “yes”, he slips a ring on her finger to cheers from a crowd of onlookers. The two were not identified.

Mostafa Norouzi, deputy police chief in Arak, told the Shahrvand daily that it is unacceptable for the young “to do whatever is common in other places of the world and disregard mores, culture and religion” in Iran.

The pair’s “offence is very clear and there is no need for explanation” about the reason for their arrest, Norouzi added.

Lawyer Isa Amini, head of the Tehran Bar Association, criticised the arrest and said he could not understand what the grounds were for such an action since the couple did not commit any wrongdoing.

However, the semi-official and hardline Fars news agency called the public proposal “shameful” and claimed it could promote “immorality”. The agency demanded “harsh” punishment to stop such displays from being repeated by others.

Iranian hardliners perceive public displays of affection as result of allegedly corrupt influence of western culture that threatens morals in this conservative Islamic society. The Islamic Republic’s strict rules forbid gender mixing in public.