No group immediately claimed responsibility. Turkey’s interior minister said it was “most likely carried out” by the Kurdistan Workers’ Party, or PKK.

Turkey launched airstrikes against what it said were sites linked to a Kurdish separatist group in Iraq and Syria, hours after an armed assault on a defense company killed five people in Ankara.

Turkish warplanes attacked nearly three dozen targets of a Kurdish militant organization in northern Iraq and Syria, Ankara's ministry of defense said late Wednesday.