After a dramatic day in Parliament when two intruders stormed the Lower House with colour canisters, initial probe by security agencies revealed the breach was well-coordinated and meticulously planned allegedly by seven people, six of whom have been nabbed. A hunt is on for the seventh person. 

According to sources, the accused knew each other for four years and hatched the plan a few days ago. 

The accused were in touch with each other through social media platforms and had done a recce before coming to Parliament on Wednesday.

(With inputs from agencies)