The injured was identified as Ishraq Ahmed, son of former chief of Bangladesh Army Gen (Retd.) Aziz Ahmed, a source confirmed.
Ishraq Ahmed is currently undergoing treatment at Combined Medical Hospital (CMH).
Anisur Rahman, the deputy inspector at Kafrul police station, said a vehicle hit a pillar of Mahakhali Flyover around 5:00 am on Tuesday.
No case has been filed in this connection until the filing of this report.