Ramna police station OC Moshiur Rahman said a bus overturned on the flyover while racing with another bus on Sunday afternoon, leaving 12 injured.
The vehicular movement on the flyover was disrupted due to the accident, he added.
Of the injured, two were sent to Dhaka Medical College Hospital in critical condition while the others were taken to adjacent hospital and clinics.
The injured are Rasel, 24, a Bachelor’s student of Donia College, son of Jaj Mia of Comilla and Johurul Islam, 40, son of Muslem Uddin of Tarash of Sirajganj.
Dhaka Medical College Hospital police outpost SI Bachchu Mia said Rasel and Johirul were admitted to the hospital.
“Both of them are in critical condition,” he said quoting the doctors.