New Delhi (CNN) An Indian court has declined to intervene in the case of a Catholic nun who says she was raped multiple times over a two year period by a bishop, charges he denies.

The case has attracted significant media attention in India, where it remains extremely rare for members of the church to publicly accuse a superior of wrongdoing.

The ruling comes after an advocacy group filed a petition on behalf of the victim in the Kerala High Court Monday, asking for the immediate arrest of Bishop Franco Mulakkal.

The group, the Kerala Catholic Church Reformation Movement (KCCRM), which is part of an umbrella body of independent groups called the Joint Christian Council, as well as some of the nun's sisters, have accused police of dragging their feet in the investigation due to pressure from local politicians and church leaders. Police deny those allegations and say the investigation is moving ahead.

The court will now review the investigation on September 24.

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