Ireland's opposition party Sinn Féin looked on course to narrowly win the popular vote in the country's general election on Friday, an exit poll suggested, but its two main political rivals— the incumbent coalition parties of Fine Gael and Fianna Fáil— will likely have enough support to retain power.

Vote counting was underway Saturday in Ireland’s national election after an exit poll suggested the contest is a close-fought race among the country’s three largest political parties. Ballot boxes were opened at 9 a.

The Republic of Ireland elects its government using a system of proportional representation known as the single transferable vote. Voters will have the opportunity to rank candidates in their constituency in order of preference, marking their favourite with a number one, a number two beside their next choice and so on.