Police have detained two persons in connection with the robbery at a fast track ATM booth of Dutch-Bangla Bank Limited at Harinhati under Kaliakoir upazila in Gazipur.
Detained Naimul and Mintoo admitted that they were involved in the robbery, police said.
The duo were held in drives at Rakhalia of Kaliakoir and Board Bazar of Tongi early Friday.
Kaliakoir police station OC Abdul Motaleb Mia said security and ATM card management organisation 'Moneyplant' Chief Executive Officer Syed Afzalul Abedin filed a case on Thursday evening.
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The amount of looted money was mentioned Tk1.83 crore in the case statement, said the OC.
Citing the ATM booth officials, police on Thursday said the looted amount was Tk1.2 core. Later, police said the amount was Tk1.94 crore.
"We are assuming that the security guard and two officials of the organisation are involved in the robbery. They are being interrogated," the OC added.
On Thursday, a group of 10 to 12 robbers swooped on the ATM booth when the officials of "Moneyplant" went to the booth to deposit money in it around 2:30am.
The robbers beat up security guard Liakat Hossain and snatched away two trunks filled with the money.
Two gunmen and seven bank officials including the security guards were present on the spot during the robbery.
