Two more persons, suspected of being involved in the murder of madras student Nusrat Jahan Rafi, were arrested on Saturday.
The arrestees - Iftekhar Hossain Rana and Emran Hossain Mamun - are residents of Chargonesh in Sonagazi upazila."They were planners of Nusrat's murder," said Sub-Inspector Md Shah Alam of the Police Bureau of Investigation (PBI).
Rana was arrested in Rangamati and Mamun in Cumilla.
Mamun is a former student of Sonagazi Islamia Fazil Madrasa where Nusrat was a student, said Md Moniruzzaman, additional superintendent of PBI.
Nusrat was set on fire on April 6, allegedly for refusing to withdraw a sexual harassment case against madrasa principal Sirajuddoula.
She died five days later at the Dhaka Medical College Hospital.