Turkish President Recep Tayyip Erdogan announced the start of "Operation Peace Spring" on Wednesday, and soon after explosions were heard in the Syrian border town of Ras Al Ain.
Turkey aims to create a “safe zone” that would be cleared of Kurdish fighters, who Ankara considers to be terrorists and an extension of Kurdish rebels fighting inside Turkey, and eventually allow for the return of refugees.
• Who has influence in Syria's north-east?
• How the world is reacting to Turkey's assault in Syria
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