Rapid Action Battalion (RAB) arrested five suspected members of Kuki-Chin National Front (KNF) and recovered two firearms from a hilly area in Bandarban Sadar upazila on Saturday night.
However, it is not yet known whether the recovered firearms are those looted on 2 April from the police and Ansar members engaged in the security of Sonali Bank in Ruma upazila.
RAB will provide more details later, they said, Daily Sun reported.
Earlier on Saturday, RAB started a crackdown on terrorist activities in Bandarban. More than 100 RAB members took part in the operation.
Khandaker Al Moin, director of RAB's legal and media wing, informed media about the operation at a press conference on Friday morning. The drive began in Ruma and Thanchi upazilas of Bandarban on Saturday.
Earlier, the abducted manager of Sonali Bank's Ruma branch Nizam Uddin was rescued from the Bathel Para area of Bandarban through the mediation RAB on Thursday, 48 hours after his abduction by KNF members.
The separatist group kidnapped the Sonali Bank manager on 2 April and tried to loot Tk 1.5 crore from the vault of the Ruma branch. Unable to take the money, they kidnapped the bank manager.
They also carried out robberies at Sonali Bank and Krishi Bank branches in Thanchi upazila of Bandarban on Wednesday.
bd-pratidin/GR