AK Party (AKP) supporters wave Turkish flags during a ceremony to mark the 16th anniversary of their party's foundation in Ankara

An AK Party (AKP) supporter waves a Turkish flag during a ceremony to mark the 16th anniversary of their party's foundation in Ankara

AK Party (AKP) supporters wave Turkish flags - with images of Turkish President Recep Tayyip Erdogan - during a ceremony to mark the 16th anniversary of their party's foundation in Ankara

AK Party (AKP) supporters shout slogans during a ceremony to mark the 16th anniversary of their party's foundation in Ankara