Sinn Fein, Fianna Fail and the centre-right Fine Gael Party of Prime Minister Leo Varadkar secured just under a quarter of seats in parliament each, making it hard to form a government without a coalition.
A general election surge in support for Sinn Fein, once the political wing of the Irish Republican Army, upset Ireland's traditional two-party grip on power.
It has been 589 days since the Catholic-Protestant power-sharing administration in Northern Ireland collapsed over a botched green-energy project.
Northern Ireland's main political parties Sinn Fein and DUP have been in talks to form a government since an election in March but are yet to come to an agreement.
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