4 suspects arrested in Bangladesh professor's killing

FILE- In this April 29, 2016 file photo, a Bangladeshi student holds a portrait of a University Professor A.F.M. Rezaul Karim Siddique during a protest against his killing in Dhaka, Bangladesh. Police have arrested four members of a banned militant group, including a regional commander, suspected in the killing last month of the university professor in northwestern Bangladesh, officials said Tuesday. (AP Photo, File) (The Associated Press)

FILE- In this April 29, 2016 file photo, a Bangladeshi man holds a portrait of a University Professor A.F.M. Rezaul Karim Siddique during a protest against his killing in Dhaka, Bangladesh. Police have arrested four members of a banned militant group, including a regional commander, suspected in the killing last month of the university professor in northwestern Bangladesh, officials said Tuesday. (AP Photo, File) (The Associated Press)

DHAKA, Bangladesh – Police say they have arrested four members of a banned militant group, including a regional commander, suspected in the killing last month of a university professor in northwestern Bangladesh.

English professor A.F.M. Rezaul Karim Siddique was hacked to death on April 23 on his way to work at a state-run university in the city of Rajshahi.

The attackers used sharp weapons and quickly fled the scene.

Rajshahi Metropolitan Police Commissioner Mohammed Shamsuddin said Tuesday that authorities have arrested four members of the Jumatul Mujahedeen Bangladesh group, including regional commander Maskawath Hasan Sakib, nicknamed Abdullah.

He said Abdullah was captured Sunday night and confessed before a magistrate, leading to the arrests of the three other suspects on Monday.