The public bus rammed into people waiting at the bus stop near the central Dikimevi metro station when the unidentified driver lost control of the wheel.
The bus, which also struck several parked cars, finally came to a stop after 60 meters.
Ankara Gov. Mehmet Kılıçlar said eight people were wounded in the incident.
The main road where the incident occurred was closed to traffic in the aftermath of the mishap.
Firefighters are continuing to pull dead bodies from under the bus.
Hurriyet Daily News