July 15 marks three years since the Turkish people defeated a coup attempt by rogue elements in the country's military. The Fetullah Terrorist Organisation (FETO) was behind the deadly move, which left at least 251 people dead.
US State Department spokeswoman Morgan Ortagus said Ankara would face "real and negative consequences" for acquiring Russian S-400 defence systems.
Bosnia and Herzegovina is chairing this year's South East European Co-operation Process, bringing together 13 countries including Turkey.
Earlier, President Recep Tayyip Erdogan opened Turkish artist Ara Guler's exhibition in the Japanese city of Kyoto.
The Turkish president unveiled the country's judicial reform strategy, saying the document will also strengthen freedom of speech.
"Five countries supposedly distribute justice in UNSC ... Is there justice for Rohingya, Libya, Palestine or Jerusalem? These so-called orators of justice are only deceiving people," Turkey's President Erdogan says.
Turkey has struggled to become a full member of the EU for the last 60 years but it is determined to gain membership, says President Erdogan.
Main opposition Republican People's Party also wants a rerun in all Istanbul district councils. It argues the same flaws which the governing AK Party said occurred during the Istanbul mayoral election apply to the 2018 presidential election.
Turkey's President Recep Tayyip Erdogan says he believes lawlessness and irregularities occurred in Istanbul mayoral elections. Opposition Republican People's Party says the decision to renew the vote is "neither democratic nor legitimate."
Turkish President Recep Tayyip Erdogan says a joint effort is needed to combat terrorism in the region.
"Attacks in the name of religion on places of worship or innocent civilians constitute terrorism, not jihad," President Recep Tayyip Erdogan said at the inauguration of Camlica Mosque.
Presidents of Turkey and Russia vow to establish peace in Syria's Idlib region, increase bilateral trade, and speed S-400 missile delivery, during high-level talks in Moscow.
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