Opposition lawmakers have thrown India's Parliament into an uproar by charging that Prime Minister Narendra Modi has done little to stop hard-liners in his party from forcibly converting religious minorities to Hinduism.

Right-wing Hindu groups allied to Modi's ruling party have conducted a series of ceremonies across India over the past week to convert Christians and Muslims to Hinduism.

Some of the Muslims have later complained that they changed their religion out of fear. India is largely Hindu, but has large Muslim and Christian minorities.

Opposition lawmakers say Modi's silence is damaging the secular nature of Indian society and the religious freedoms guaranteed by its Constitution.

The upper house of Parliament was adjourned Monday after opposition lawmakers demanded the prime minister clarify his position on the conversions.