Dhaka, Oct. 7 -- Police have arrested a man in connection with the killing of a 17-year-old student in the capital's Kafrul area.

The arrestee was identified as Md Abdullah Al Mamun alias Mamun Sarkar, 24.

According to police, Mamun developed a friendship with Md Rakibul Islam, 17, after meeting him online a few months ago. On September 16, Mamun allegedly called Rakib over WhatsApp and took him to his residence in Shukrabad after asking him to come to the area in front of Shewrapara Metro Rail Station.

He allegedly held Rakib hostage and demanded Tk 15 lakh in ransom from his family. At one point, a scuffle took place between them, during which Mamun allegedly twisted Rakib's neck, causing his death.

Briefing reporters at the DMP Med...