Security measures were increased in the area. There was no immediate claim of responsibility for the attack bit militants from the Kurdistan Workers’ Party, or P.K.K., which has carried out an insurgency against the Turkish state for more than three decades, have claimed responsibility for similar attacks against Turkish security forces. Two suicide bombs in October, 2015 outside Ankara’s main train station as people gathered for a peace rally killed more than 100 people. It was Turkey’s deadliest attack. On January 12, Daesh targeted Istanbul’s Sultanahmet, concerning which the city’s governorate released a statement saying that 10 were killed and 15 injured in the blast. On February 17, a bomb was detonated while military service vehicles were passing by killed at least 28 civilians and military personnel and injured 61 others in capital Ankara.