A gang of women vigilantes, who fight for social justice in rural India and are famed for their pink saris and sticks, are the subject of an award-winning documentary opening this week. The Gulabi (Pink) Gang battles for women's rights across a handful of districts in the poverty-stricken northern state of Uttar Pradesh, tackling domestic violence, dowry disputes, child marriage and other forms of abuse. The fatal gang-rape of a student in the capital New Delhi in December 2012 caused widespread anger and protests across the country, but such crimes in poorer rural areas still receive far less media attention. The film "Gulabi Gang", directed by Nishtha Jain and being  released nationwide on Friday, tracks the founder and leader of the group, 56-year-old Sampat Pal Devi. It also explores the workings and recruitment strategies of the gang, whose members now number in the thousands. Jain said she was attracted to making the documentary because the group was "a spontaneous women's movement in one of the most backward parts of India". "I wanted to profile not only the leader but also the other courageous members of Gulabi Gang, the majority of whom are poor, old, unlettered and from backward castes," she told AFP. The film opens with a case in which a young wife has been found burnt to death. Her family blames a fire that broke out when she was cooking. Pal and her comrades believe there is foul play involved and pursue the case relentlessly -- offering support to the girl’s parents and ensuring the police conduct speedy investigations. Their method is to protest, arbitrate, counsel and, in extreme cases, use aggression to drive home their message. But deep-rooted prejudices can still hamper the gang's work -- some members have faced expulsion for standing by male relatives who have abused women. Gang leader Pal, who attended a screening of the documentary in Mumbai last week, said she does not only fight for women. "I try to see the man’s and the woman’s point because if a marriage breaks, the homes of both are destroyed," she said, adding that she hoped the film would raise awareness and understanding. The film, which has won best documentary awards in Norway and Dubai, also addresses the disconnect between rural and urban communities in India. "The extent of gender and caste violence that goes unreported is shocking," said Jain. An upcoming Bollywood movie called "Gulaab Gang" is also said to be based on the pink vigilantes, although director Soumik Sen denies it is about them and describes it as a work of fiction.