Two suicide bombers blew themselves up in a car on Saturday in the Turkish capital Ankara after police tried to search the vehicle, according to Ercan Topaca, the governor of Ankara.
Both suspects, who had refused to surrender, died in the incident on the outskirts of the capital, the governor was quoted by broadcaster CNN Turk as saying. No one else was injured, according to local media reports.
The suspects were believed to have been a man and a woman. A third suspect was still being sought.
Police seized two plastic explosives and 200 kilograms of ammonium nitrate from the scene, in a rural farm area, the Ankara governor's office said in a statement.
Topaca said the Ankara incident appeared to have links to the Kurdistan Workers' Party (PKK) and that police were responding to intelligence warnings coming from Diyarbakir, a mostly Kurdish city in the south-east, the heart of a three-decade conflict between the state and Kurdish militants.
Over 2,000 have been killed in the conflict, which restarted after peace talks with the armed PKK collapsed in 2015.
Justice Minister Bekir Bozdag said it appeared that the attackers were aiming to blow up the vehicle in Ankara, a city which has witnessed major car bombings this year claimed by Kurdish militants.
The incident follows a motorcycle bombing outside a police station in Istanbul on Thursday. The attack, which injured 10 people, was claimed by the Kurdistan Freedom Falcons (TAK), a shadowy splinter group.
Turkey has also witnessed several attacks carried out by the Islamic State extremist group over the past year.