Erdogan supporters celebrate after knife-edge vote in Turkey

Supporters of Turkish President Erdogan celebrate outside his party's headquarters in Istanbul after Sunday's election, despite the fact neither Erdogan nor his opposition rival secured a first-round win. The country is now bracing for its first election runoff, which is planned for May 28.

Almost complete results from Turkey's most important election of its post-Ottoman era showed Erdogan -- in power since 2003 and undefeated in more than a dozen national votes -- falling just short of the 50-percent threshold needed. Figures showed Erdogan picking up 49.4 percent of the vote. Opposition leader Kemal Kilicdaroglu was trailing with 45.0 percent -- a disappointing outcome after late pre-election polls showed him in the lead.