Angry women set fire to the houses of the two the men accused, along with two other suspects, of forcing two women to parade naked through a crowd in the state of Manipur In northeast India, where months of ethnic violence have killed at least 120 people, according to a video released on Friday, AFP reports.

The four men arrested by police on Thursday were identified from a video of the incident that happened in early May and went viral on social media on Wednesday, sparking outrage across the country.

“Four main accused arrested in viral footage case,” Manipur state police said on Twitter on Thursday evening.

The video shows two women believed to be from the Kukis tribe, which is in ethnic conflict with the Mayteis tribe, walking naked down the street, taunting and harassing a crowd identified as belonging to the Mayteis community, the dominant ethnic group.

On the day the four suspects were arrested, a group of women activists threw stacks of hay at the house of one of the four men in Imphal and set it on fire.

As the fire raged, women members of the Meiteis community, like the four accused, attacked the walls and roof of the house with sticks.

On Friday, another group of women vandalized the house of the second suspect.

Inter-ethnic violence in Manipur actually started with

India is generally a conservative and patriarchal country, but in the Meiteis community, where women play a larger role in society than elsewhere, there are women activists.

A video of two naked women sparked protests across India on Friday, with demonstrators demanding the resignation of the chief minister of Manipur state, whom they accuse of inaction.

“Can normal people do this? Even cats, dogs, animals have never committed such disgusting acts,” said a protester in Imphal, the capital of Manipur state, where hundreds of women had gathered.

The state government, led by the ruling Bharatiya Janata Party (BJP), announced that the police had taken action as soon as the video surfaced on social media, two months after the incident.

A “thorough investigation” is underway, state Chief Minister N. Biren Singh said on Twitter.

“We will make sure that strict measures are taken against all the culprits, including the death penalty,” he emphasized.

Violence erupted in Manipur in May after a protest march against the possibility of members of the Meiteis community, the majority of whom are Hindus, being granted more favorable “scheduled tribe” status, which would guarantee them quotas for public sector jobs and university admissions.

This hypothesis reignited old fears among the Kukis – generally Christians – that the Meitei, as well as members of other tribal groups, would be allowed to purchase land in areas currently reserved for them.

Houses and churches were set on fire, and dozens of people were forced to take refuge in government-run camps.

In a report submitted to the court in June, the civil society group Manipur Tribal Forum said that numerous and gruesome incidents of violence – rape and beheading – had taken place and no investigation had been launched by government authorities.

Indian Prime Minister Narendra Modi said on Thursday that “the incident in Manipur is a disgrace to any civilized society”.

“It brings shame to the whole nation,” condemned Modi, who spoke for the first time about the violence.

India’s Supreme Court has warned the Modi government that if it fails to act, it will order action.