Savar, Sept. 8 -- Preliminary investigation by the Police Bureau of Investigation (PBI) indicated that an extramarital affair may have been behind the much-talked-about triple-murder in Jamgora of Ashulia.

A suspect has been arrested, said Anisur Rahman, a sub-inspector of Dhaka District PBI, on Tuesday afternoon.

He said the PBI launched a shadow investigation shortly after the incident and arrested the suspect.

His identity is being withheld for the sake of the investigation.

Necessary evidence has also been recovered, he said, adding that the specific motive and other details of the killings would be disclosed after completion of the investigation.

Nazma Khatun, 39, daughter of Atiar Rahman of Borpukuria village in Dinajpur's Nawa...