The Kurdistan Workers Party (PKK) on Friday claimed responsibility for this week's attack on Turkish defense company TUSAS that killed five people in Ankara, it said in a statement.
Two assailants - a man and a woman - carried out Wednesday's assault with automatic rifles and explosives on the headquarters of Turkish Aerospace Industries (TUSAS) in Ankara. Twenty-two people were also wounded.
Both attackers were killed. Interior Minister Ali Yerlikaya said later that they were confirmed to be PKK members.
The perpetrators of the attack infiltrated Türkiye from Syria, President Recep Tayyip Erdogan was cited as saying by broadcaster NTV and others on Friday.
Speaking to reporters on a flight back from Russia's Kazan, where he attended the BRICS summit, Erdogan vowed to eradicate terrorism at its source in Syria, adding that Türkiye would continue its battle against militants until the end.
Türkiye carried out airstrikes against Kurdish militants in northern Iraq overnight, hitting dozens of targets for the second night in a row, the Defense Ministry said on Friday.
The operation followed a security meeting that Erdogan chaired with key ministers and the armed forces and intelligence agency chiefs in Istanbul on Thursday evening.
Türkiye hit 34 PKK targets in Hakurk, Gara, Qandil and Sinjar in northern Iraq, destroying shelters, warehouses and other facilities, and "neutralizing" a large number of militants, the ministry said.
Security sources said separately that Türkiye's National Intelligence Organization (MIT) had hit a total of 120 PKK targets in Iraq and Syria since the attack in Ankara.