Activists of Islami Chhatra Shibir, the student body of Jamaat-e-Islami, brought out a surprise procession in city's Moghbazar area on Tuesday morning.
Meanwhile, a pedestrian, identified as Sumon Mia, 22, received bullet injury as police fired on the procession.
Ramna thana OC Moshiur Rahman said a group of Shibir activists, numbering 20-25, brought out a procession in Sudhi Samaj area around 11:30am over the Supreme Court's verdict on Jamaat leader Mir Quasem Ali's appeal.
As police tried to intercept them, the Shibir men pelted brick bats towards the law enforcers.
The law enforcers shot gunfire to tackle the situation, leaving a youth injured, the OC said, adding that the injured was admitted to Dhaka Medical College Hospital.