Turkish President Tayyip Erdogan cast his ballot at a polling station during the parliamentary election in Istanbul, Turkey, June 7, 2015.
Erdogan's AKP has suffered its first fall in support for four election after a new party representing minority Kurds in the country made huge inroads in Sunday's polls.
The result means Erdogan looks unlikely to be able to form a majority government and will probably have to form a coalition, possibly with Turkey's extreme right-wing party.
Alternatively, fresh elections could be called within six weeks if no government can be formed.
All this uncertainty has sent investors heading for the hill. The Turkish stock market has opened down over 8% and the Turkish lira is down over 5% against the dollar on the news, its worst one day fall in 7 years.
Investing.com
News of the election result has sent the Lira tumbling against the dollar.
Erdogan's Justice & Development party (AKP) won 41% of the vote, compared to 49% in 2011 elections. But the new Kurdish HD party managed to capture 12% of the vote, uniting Kurds with liberal left-wingers in Turkey.
The result is not only a blow for Erdogan's party but also his ambition to consolidate his own power and move Turkey to a more presidential system.
Erdogan, who has ruled for 13 years, campaigned with a view to converting Turkey into a presidential system, rather than a parliamentary system. Voters have resoundingly rejected this vision.