Chittagong Metropolitan Session Judge Akbar Hossain Mridha passed the order , said Public Prosecutor (PP) Md Fakhruddin Chowdhury.
Khasru’s lawyer Mofizul Haq Bhuiyan said they will file petition with the higher court challenging the lower court order.
Earlier, the High Court granted anticipatory bail to Amir Khasru in two cases filed for “instigating” violence during the recent student movement over road safety and “conspiring” against the state.
After expiry of bail on October 7, the Chittagong court extended his bail till October 21.
Bangladesh Chhatra League (BCL) Chattogram city unit Acting General Secretary Jakaria Dastagir filed the case under sections 57 (2) of ICT Act and 15 (3) of the Special Powers Act with Kotwali Police Station on August 4.
A reported audio clip of telephonic conversation between the BNP leader and an unknown boy over intensifying the ongoing student movement went viral on Facebook and YouTube.