Dhaka, Jan. 26 -- Police are still trying to establish the motive behind the fatal shooting of Khulna University student Arnab Kumar Sarkar, while the family has no suspects in mind.

Md Moniruzzaman, deputy commissioner of Khulna City Police (southern division), said three people were detained for questioning the night after the murder.

He said: "They are being questioned initially. Investigations are ongoing."

However, police did not reveal the names of the detainees.

Arnab, 26, was shot dead by gunmen in the Tentultala intersection of Khulna city around 9pm on Jan 24.

He was drinking tea while leaning on a motorcycle in front of a tea shop when gunmen arrived on several motorcycles, shot him, and fled.

One of the bullets pierced t...