Dhaka, May 7 -- Police have arrested three people, including a university student and web developer, over allegations of collecting and selling citizens' national ID and mobile financial services account information.

The Criminal Investigation Department (CID) disclosed the arrests in a statement on Thursday after a nearly seven-month investigation.

One of those arrested, 22-year-old Arman Hossain, is a computer science and engineering student and an app developer, according to the statement.

CID did not disclose the identities of the two others arrested alongside him.

Investigators said they first detected a Facebook account on Oct 9 that was advertising citizens' full NID data, SMS records, information on mobile financial services a...