Dhaka: Police will seek Obaidul Khan, the suspected killer of schoolgirl Suraiya Akter Risha, in custody for quizzing, said the Ramna police Officer-in-charge Moshiur Rahman.

The OC on Thursday morning told NTV Online Obaidul was brought back to Dhaka from Nilphamari on Wednesday night, and kept in Ramna police station.

Police will seek Obaidul in custody for 10 days of interrogation.

Earlier, on 31 August, a team of Dhaka Metropolitan Police led by DMP additional deputy-commissioner HM Azimul Haque arrested Obaidul Kham at the village of Sonahar in Domar upazila of Nilphamari during a raid.

On 30 August, police detained a sister, Khadiza Begum, and brother-in-law, Khadimul Islam, of Obaidul, from Niratongi village in Birganj upazila on Monday evening.

Students of Willes Little Flower School and College in Dhaka on 30 August threatened to launch a tougher movement if their demand for arresting Obaidul is not met by 1 September.

Suraiya Akhter Risha, 14, daughter of Md Ramzan Ali of Bangshal of old Dhaka and an eighth-grader of Willes Little Flower School and College, was stabbed in front of her educational institution at Kakrail in the capital on 24 August.

Risha’s mother filed a case with Ramna Police on the same day accusing Obaidul Khan for the murder.

Risha died to her wounds at Dhaka Medical College Hospital on 28 August morning.