Civil society groups had misgivings about universal IDs for all citizens right from the early days.

Opponents of Aadhaar have said it could be used as an instrument of state surveillance while data security and privacy regulations are still to be framed.

There are an estimated 809,000 Rohingya sheltering in Bangladesh after fleeing violence and persecution in Myanmar.

"The bottom line? This is a deplorable situation. This is as bad as it gets. We need 75 million for the next six months."

The local police official, who asked not to be named, said a man named Imran Chhimpa had been detained early Tuesday evening in connection with the investigation