A group of furious women set on fire the house of an Indian man accused of parading two women naked in a northeastern state where months of ethnic violence have left at least 120 dead, footage showed Friday.

A clip went viral Wednesday showing two women said to be from the Kuki tribal group walking naked along a street, being jeered at and harassed by a mob reportedly from the Meitei community.

Violence erupted between the mainly Christian Kuki and the predominantly Hindu Meitei in May over job quotas and land rights, and intermittent clashes have continued since.

The emergence of the women’s humiliation – which happened in May – triggered outrage across the country, with Prime Minister Narendra Modi saying it had “shamed India”.

Police arrested four suspects Thursday, and the same day a group of women activists threw stacks of hay into the house of one of the men in Imphal and set it on fire.

As the fire raged, the women – members of the Meitei community, like the accused – broke down the walls and roof of the house with sticks.

India is generally traditionalist, conservative and patriarchal, but the Meitei have a history of women’s activism, with women having a more prominent role in society than elsewhere.

The video of the naked women sparked protests across India on Friday with demonstrators calling for the state’s chief minister to step down over the delay in taking action.

“Can normal people do these things?… Even cats, dogs, animal(s) never committed these kind of filthy act,” said one demonstrator near Imphal, where hundreds of women gathered to protest.

“This is not even how human beings treat other human,” she said.

India’s Supreme Court warned Modi’s government Thursday that if it does not act, “we will”.

Authorities in Manipur, led by the ruling Hindu-nationalist Bharatiya Janata Party (BJP), said police had taken action as soon as the video surfaced on social media.

A “thorough investigation” was under way, the state’s chief minister N Biren Singh tweeted Thursday.

“We will ensure strict action is taken against all the perpetrators, including considering the possibility of capital punishment,” he added.

The Manipur violence came after the Kuki community protested Meitei demands for reserved public job quotas and college admissions as a form of affirmative action, stoking long-held fears that they might also be allowed to acquire land in areas currently reserved for tribal groups.

Homes and churches were torched, with tens of thousands of people fleeing to government-run camps.

In a detailed report to the Supreme Court in June, civil society group Manipur Tribal Forum said many gruesome acts of violence, including rape and beheading, had not been investigated by state authorities.

One such incident appeared on Twitter Thursday, reportedly showing an aide to a BJP lawmaker in the state holding a victim’s severed head, and disappeared from the platform within hours.