Unidentified miscreants exploded two crude bombs on the Moghbazar-Mouchak Flyover near the United News of Bangladesh (UNB) office 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.
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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.