Somebody in the Rashtriya Janata Dal hierarchy saw that the noose was tightening around the party supremo Lalu Prasad Yadav's family and decided to turn a whistle-blower. The person increasingly feared for his own safety and suspected the long arm of the law might soon reach him.

The information he brought out, according to a report in the Economic Times, was crucial and helped the law enforcement agencies proceed against Lalu Prasad’s family with fresh vigour. The allegations appears to be centered around round-tripping of money by Lalu Prasad Yadav’s children Misa Bharati and Tejashwi Yadav.

The Bharatiya Janata Party (BJP) appears to have had access to all this information and decided to use this as a final trigger to engineer a break up of the Mahagathbandhan.

The BJP at the Centre, according to this report, had been passively cultivating ties with Nitish Kumar and had been looking for an opening in the Mahagathbandhan. With fresh information about Lalu Prasad family’s corruption being flashed by BJP Bihar supremo Sushil Modi, Nitish Kumar must have found his position increasingly untenable.or

On his party Bihar Chief Minister Nitish Kumar continued to be in good communication with the central BJP leadership. The ET report points to his continued habit of dining at a BJP union minister’s residence whenever he was in New Delhi. He was broadly in support of demonetisation and other big moves by the BJP.