Reuters – Indian Prime Minister Narendra Modi said on Tuesday he was "deeply concerned" about the rape of an elderly nun and the demolition of a church as protests for the better protection of women and religious minorities erupted across the country.

Modi has asked for an immediate report on the violence on the weekend, according to a statement. There were angry scenes in parliament as legislators demanded to know why the man accused of rape had not been arrested. Over the last few months, Modi has been criticized for being slow to condemn a series of attacks on Christian institutions, fuelling concern his Hindu nationalist government is failing to rein in Hindu zealots.

Outrage over the rape of the nun has reignited an angry debate about the safety of women.

"We all feel ashamed, never before could this have been imagined, we have never heard of such things," said Mohammed Salim, a member of the lower house of parliament. "And despite that, after 70 hours no arrests have been made."During a debate, members of parliament shouted: "We demand justice." Hundreds of protesters clashed with police in West Bengal state on Monday evening with the disturbance blocking the convoy of the state leader Mamata Banerjee for almost an hour.

Banerjee, a self-styled champion of the poor, was prevented from traveling along a motorway after she visited the nun in hospital. The crowd surrounded her car with protesters demanding to know why the man suspected of raping the nun had not been caught.Law and order in India is primarily the responsibility of state governments.

Police detained nine men after the attack on the 75-year-old nun in a convent school but no arrests have been made. A group of men broke into the school and stole some items. One of them then raped the nun.

Even after national soul searching caused by the gang rape and murder of a student in Delhi two years ago and tougher penalties for men who attack women, India is struggling to tame chauvinistic attitudes that leave women vulnerable to rape.

In the past, Banerjee and members of her Trinamool Congress party have attracted criticism for comments on rape deemed insensitive. Two years ago, Banerjee accused a rape victim of making up the incident and one of her ministers questioned why she was out late drinking at a night club.

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