Police in India have arrested a man alleged to be behind the offering for sale of prominent Muslim women through a fake online auction, according to government officials, in a case that has sparked anger and outrage across the country.

Satej Patil, the technology minister for the Maharashtra state, said late Monday that the cyber unit of the Mumbai Police has detained a 21-year-old engineering student from the southern city of Bengaluru in the neighboring Karnataka state and registered a case against him.

Police did not reveal the identity of the suspect, and it wasn’t clear whether the man had made the auction website.

Photographs of more than 100 prominent Muslim women, including journalists, activists, film stars and artists, were displayed last weekend without their permission on a website and put up for fake auction.

The women listed on the website also included a 65-year-old mother of a disappeared Indian student and Nobel laureate Malala Yousafzai.

The website, which was taken down within 24 hours, was named "Bulli Bai" — a derogatory slang for Indian Muslims. Though there was no real sale involved, the Muslim women listed on the website said the auction was intended to humiliate them, many of whom have been vocal about rising Hindu nationalism in India and some of the policies of Prime Minister Narendra Modi.

The website was hosted on GitHub, a San Francisco-based coding platform.

A company spokesperson said GitHub had taken down the user account which had hosted the website on its platform, and that it would cooperate with investigating authorities.

The fake auction unleashed outrage on Twitter after complaints from the victims, with several women posting screenshots after finding their photos listed on the website.

Women rights groups and politicians from opposition parties urged the ruling Bharatiya Janata Party to take action against the online harassment of Muslim women, prompting India’s technology minister Ashwini Vaishnaw to promise strict measures.

Police in at least three states said they have opened investigations into the incident and filed criminal complaints against developers of the website, based on the complaints of the targeted women.

This was not the first time Muslim women were listed on a fake auction website. Last year in June, a similar website called “Sulli Deals,” also a derogatory slang for Muslim women, was created for the same purpose.

Also read: 'Sulli Deals': How photos of Muslim women were misused on a GitHub app

That website remained online for weeks and was only taken down by authorities after complaints from victims. Police opened an investigation into that case, but no one was arrested or detained.

Indian women, particularly Muslims, have often found themselves as the target of hate and abuse on social media platforms, including Twitter.

Outspoken Muslim women, including journalists and activists and those critical of Modi and his Hindu nationalist party, have received threats of rape and violence.

The fake auction website, many of the victims say, is the latest attempt to intimidate them.

Khadija Khan, a lawyer and journalist with Bar & Bench website, said she received a Twitter notification on New Year’s Eve that informed her she was tagged in a tweet that displayed her picture as part of the fake auction. The account has since been suspended.

Khan’s initial reaction was to report the tweet and block the user, dismissing it as spam. But she soon received messages from her friends and colleagues who confirmed to her that she was also on the list.

“My initial reaction was indifference and dismissal because we are used to daily trolling but by the next day, it had turned into shock and horror. Realizing what it was actually gave me nightmares,” Khan said.

Khan found support from her family and colleagues, but the incident left her shaken.

“It’s a message that ‘Look! We can brazenly humiliate and sell Muslim women online and still go scot-free while they are still vying for some modicum of justice,’” Khan said.