The National Board of Revenue yesterday asked banks and financial institutions to provide detailed information on all types of accounts and transactions of Md Monir Hossain, also known as Golden Monir, his family members and their five firms.

The NBR's initiative came two days after Rab arrested Monir on charges of possessing illegal firearms and drugs in the capital's Merul Badda.

The crime busters recovered gold ornaments weighing 8kg, Tk 1.09 crore in cash, Tk 9 lakh in currencies of 10 countries, a pistol, four bullets and four litres of foreign liquor from his house and five SUVs -- two from his residence and three from his car showroom.

In a letter yesterday, the Central Intelligence Cell (CIC) of the NBR asked banks and financial institutions to send all sorts of information of deposit accounts, lockers or vaults, savings instruments, credit cards, investment scheme, beneficiary owners or stock market-related accounts, and all types of loans within seven days.

The NBR wanted banks to provide information of the persons and firms from July 2013 till date. It suggested banks provide information of closed accounts also, according to the letter.

As per the CIC's instruction, banks will have to provide statements of accounts of Monir's mother, spouse and son apart from five companies.

The firms are Auto Car Selection Ltd, Gulf Auto Cars Ltd, Monir Builders, Golden Gear and Monir Trading/Trade International, said the letter.

The CIC warned banks of fine and legal action for failure to comply with the directive.