The arrestees are Maksud Alam, a councillor of Sonagazi municipality and acting general secretary of Awami League’s municipality unit, and Nur Uddin.
A team of Police Bureau of Investigation (PBI) arrested Maksud, also a member of the governing body of Sonagazi Senior Fazil Madrasa, from a hotel in the capital on Thursday night.
Tipped off, a PBI team conducted a drive at the hotel around 11pm and arrested Maksud, said Mohammad Maniruzzaman, additional superintendent of Feni Police.
Meanwhile, Maksud was suspended from the party on Friday.
A press release signed by upazila AL president M Ruhul Amin and general secretary Advocate Rafiqul Islam said the action was taken against Maksud as he was arrested in the case.
Nur Uddin was arrested from Mymensingh district on Friday.
Shah Alam, inspector of Police Bureau of Investigation (PBI), Feni, said a team of police arrested Nur Uddin, son of Ahsan Ulla of Charchandi village in Sonagazi upazila, from Mymensingh district around 11:30am.
Nur Uddin is the convener of Sirajuddoula Mukti Parishad and he is the No 2 FIR-named accused in the case.
He also led the demonstration held protesting the arrest of principal Sirajuddoula of Sonagazi Islamia Senior Fazil Madrasa.
On 6 April, Nusrat was set afire at an examination centre allegedly by people loyal to the principal of her madrasa after he was arrested and subsequently suspended as she had accused him of sexually harassing her.
Nusrat Jahan lost her battle for life on Wednesday night at Dhaka Medical College Hospital in the capital.