NEW DELHI  The leaking of a long-awaited confidential report on one of the most divisive attacks in modern Indian history raised a furor in India’s Parliament on Monday, with lawmakers demanding to know how the report made its way to a newspaper and cable news channel.

The report, 17 years in the making, is an investigation of the destruction of the Babri Masjid, a mosque in the town of Ayodyha, by radical Hindu activists who claimed the site as the birthplace of the god Ram. They claimed Muslim rulers had destroyed the temple and replaced it with a mosque in the 16th century.

After years of heated protest over the site, a Hindu mob stormed the mosque in 1992, reducing it to rubble. The destruction of the mosque set off violent clashes between Hindus and Muslims that left more than 1,000 dead, mostly Muslims.

The scale of the violence was among the worst since the partition of British India, and bitterness and recrimination over the event have reverberated for years.