Dhaka: Rapid Action Battalion (RAB) on Thursday interrogated freedom fighter Bir Protik Habibul Alam in Dhaka about a global extortion racket.

Commanding officer of RAB-1 Lt Col Sarowar Bin Kashem said they asked Habibul Alam to pay a visit to the RAB battalion office in the afternoon as they found his telephonic connection with the racket.

A victim earlier filed a complaint with the elite force that an international extortion gang, "Kalu Bahini", comprising mostly of Cameroon citizens conned him out of Tk 2.5 crore, said the RAB officer.

At one stage of investigation into the complaint, RAB found that Habib had telephonic conversations with the racket, he added.

During interrogation, the gallantry award winning freedom fighter told the elite force that the racket also embezzled $ 11,000 from him, Sarowar said, adding that but he did not file any complaint in this regard.

"Habibul's statement seemed to be confusing. Further details will be disclosed later as we're now probing the matter," he added.