India, April 3 -- Delhi Police have registered at least two so-called "mother conspiracy" first information reports (FIRs) as part of a larger crackdown on the alleged conspiracy behind illegal Bangladeshi immigrants staying in the Capital, according to officials familiar with the matter.

The action follows a directive from police commissioner Sanjay Arora, who on March 6 ordered various units to register six such FIRs by April 5 to investigate "networks" facilitating illegal migration from Bangaldesh.

Investigators have also been told to also zero in on anyone found helping illegal Bangladeshi migrants.

"A drive to take action is to be undertaken, against all persons who have, or are helping illegal Bangladesh/ Rohingya immigrants tow...