An assistant sub-inspector of Rangpur police was arrested in a case filed for gang-rape of a ninth grader, police said.

Raihanul Islam alias Raju, who was discharging duties as an ASI of Detective Branch (DB) of police, was arrested from Metropolitan Police Lines around 9:00pm yesterday, our Dinajpur correspondent reports quoting police.

Two other persons -- Babul Hossain and Abul Kalam Azad who were arrested on Tuesday -- gave confessional statement, superintendent of Rangpur PBI ABM Zakir Hossain said at a press briefing last evening.

The victim's statement was also recorded at a local court, the SP said.

The incident happened at the house of Sumaiya Akter Meghla alias Aleya at Kedarer Pool area in the city on October 23.

On information, police rescued the girl and admitted her to the One Stop Crisis Centre of Rangpur Medical College Hospital.

They also arrested Aleya and one of her associates Surovi from the house. They were sent to jail later.   

The victim's father filed a case with Haragachh Police Station under Rangpur Metropolitan Police later that night. Later, the case was handed over to PBI.