Fighters with a Kurdish separatist militant group that has waged a decades-long insurgency in Turkey began laying down their weapons in a symbolic ceremony on Friday in northern Iraq, the first concrete step toward a promised disarmament as part of a peace process.

The disarmament process will start under tight security in Iraqi Kurdistan and is expected to take all summer.

Dozens of Kurdistan Workers Party (PKK) militants began handing over weapons in a ceremony in a cave in northern Iraq on Friday, officials said, marking a symbolic but significant step toward ending a decades-long insurgency against Turkey.