An explosion killed at least 27 people and wounded 75 others on Sunday in Ankara.
The blast came after a car exploded near a bus stop, and the cause of the explosion appeared to be a suicide car bombing.
No one had claimed responsibility for the attacks.
Gunfire was heard after the explosion and ambulances rushed to the area. Several cars were seen on fire.
The blast occurred near Guven Park, which is connected to a major transport hub.
The explosion comes less than a month after a bomb killed 29 in Ankara. Kurdish militants took responsibility for that blast.
The blast also occurred two days after the U.S. Embassy issued a security warning about a potential plot to attack Turkish government buildings and housing in one Ankara neighborhood and asked its citizens to avoid those areas.
