Turkish authorities have detained 26 people in connection with a car bombing in the south-eastern town of Viransehir, the state-run Anadolu news agency reported Saturday.
The attack on a housing complex for judges and prosecutors left two people dead, including a 3-year-old, and 11 others injured on Friday.
The government said it suspects the outlawed Kurdistan Workers' Party (PKK) was behind the bombing, although no group has publicly claimed responsibility.
The PKK has been engaged in a decades-long fight for autonomy in Turkey's south-east.
Viransehir is in Sanliurfa province, bordering Syria, and the region has also seen attacks by the Islamic State extremist group.