The Turkish government has condemned a car bomb attack targeting a governor's office in the southern city of Adana, which left two people dead and more than 30 injured.
The blast came only weeks after the US warned extremists were planning attacks.
During a news conference in Adana on Thursday, Energy Minister Berat Albayrak promised to "bury ... those who commit terrorism, their pawns and their supporters".
There was no immediate claim of responsibility.
The attack was the latest in a string of deadly bombings that have rocked Turkey for more than a year, carried out by Kurdish militants or the Islamic State group.
The state-run Anadolu agency quoted provincial governor Mahmut Demirtas as saying two people were killed.
Anadolu said the blast, which occurred shortly after 8am on Thursday (4pm AEDT), was from a vehicle in front of the building.
Video showed a vehicle ablaze in the car park outside the building and thick, black smoke rising into the sky.
Windows were blown out and parts of the facade of the building, about six floors high, were torn off.
Energy Minister Berat Albayrak, the son-in-law of President Tayyip Erdogan, who was in Adana for a conference, said 33 people had been wounded in the blast.
"Damned terror continues to target our people. We will fight with this terror to the end in the name of humanity," Turkish EU Affairs Minister Omer Celik wrote on Twitter, saying he had spoken to the Adana governor.
The US embassy in Turkey strongly condemned what it described as an "outrageous terrorist attack" and said it stood against terror with Turkey, a NATO ally and member of the US-led coalition against Islamic State.
Labour Minister Mehmet Muezzinoglu said Kurdish PKK militants might have been responsible.
Adana is near Incirlik Air Base, which the US military uses to launch attacks against Islamic State militants in Syria.
Families of US military personnel were ordered to leave Adana and some other parts of Turkey in March over security concerns.
The US consulate general in Adana warned three weeks ago that extremists "continue aggressive efforts to attack US citizens and other foreigners in Adana".
