Mostafa, his niece, wife, and two sons went to the beach at around 12.00pm Wednesday.
As Mostafa and his family went swimming they got caught up in a strong current and were pulled out to sea.
Only the NSI field officer's wife Selina Shikder, 35, her sons Abdul Karim, 16, and Mahathir Mohammad, 9 were able to make it back to shore.
On information, police, coast guard, fire service and locals launched a rescue operation. During the search, locals found the missing bodies at around 5pm and handed them over to police, the NSI joint-director said.