Unidentified miscreants exploded two crude bombs on the Moghbazar-Mouchak Flyover at Mouchak area of the city around 8.20 pm on Wednesday.
No casualty was reported from the incident.
Md Rafiq, Sub-Inspector of Ramna Model Police Station, said hearing the information of the blast he came to the spot.
The two bombs were exploded on the flyover, he added.
Ashiqur Rahman, a security guard of the Cosmos Centre where the UNB office is located, said that he was performing his regular duty while two crude bombs exploded near the office.
