While the center-right New Democracy Party won another four years in Greece's parliamentary elections, observers were stunned by the entry of three far-right parties, bringing the far-right back into parliament.
Alexis Tsipras left-wing Syriza party suffered a major defeat at the polls on Sunday, but was next in line to receive the mandate and had already indicated he would be obliged to reject it.
A second election, likely to be held in late June or early July, would be conducted under a new electoral law that gives bonus seats to the winning party