India's Prime Minister Narendra Modi on Thursday said the incident of alleged harassment of women in the eastern state of Manipur was "shameful" and urged all state chiefs to ensure safety of women.

Several videos have surfaced on social media which show two women paraded naked on a street in violence-hit Manipur, after allegedly being gang raped.

"The guilty will not be spared. What has happened to the daughters of Manipur can never be forgiven," Modi told reporters ahead of a parliamentary session in his first public comments related to the Manipur conflict, reports Reuters.

The violence depicted in the video was emblematic of the near-civil war in Manipur that has left more than 130 people dead since May, as mobs rampage through villages killing people and torching houses. The ethnic violence was sparked by an affirmative action controversy which saw Christian Kukis protest a demand from the mostly Hindu Meiteis of a special status that would let them buy land in the hills populated by Kukis and other tribal groups and get a share of government jobs.

The clashes have persisted despite the army's presence in Manipur, a state of 3.7 million people tucked in the mountains on India's border with Myanmar that is now divided in two ethnic zones. The two warring factions have also formed armed militias, and isolated villages are still raked with gunfire. More than 60,000 people have fled to packed relief camps.

Police said the assault on the two women happened May 4, a day after the violence started in the state. According to a police complaint filed May 18, the two women were part of a family attacked by a mob that killed its two male members. The complaint alleges rape and murder by "unknown miscreants," and no arrests have been made yet.

The two women are now safe in a refugee camp.

They are from the Kuki-Zo community, the Indigenous Tribal Leaders' Forum, a tribal organization in Manipur, said in a statement.

India's Women and Child Development Minister Smriti Irani called the incident "condemnable and downright inhuman." She said Thursday investigations were underway and that "no effort will be spared to bring perpetrators to justice."

India's main opposition Congress party president Mallikarjun Kharge, however, accused the ruling Hindu-nationalist Bharatiya Janata Party of "turning democracy and the rule of law into mobocracy."

Kharge said Modi should speak about Manipur in Parliament, a demand that has been made by other opposition parties and right activists.

"India will never forgive your silence," he wrote on Twitter.