Sinn Féin would demand a border poll if it was to be part of any proposed coalition after the next election.
Mary Lou McDonald told her party's Ard Fheis last night that a vote on Irish unity needs to happen within five years.
She also made pre-election promises to make childcare, education and rent cheaper.
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Two men remain in custody after the gardaí foiled another possible gangland murder in Dublin.
Armed officers searched a house in Clondalkin on Friday and found a loaded gun and bullets.
The findings are linked to the Kinahan-Hutch feud, which has resulted in more than 20 killings in the past four years.
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World Day of Remembrance For Road Traffic Victims is being marked around the globe today.
It is a day when commemorations take place to remember those injured or killed in road traffic collisions.
The Road Safety Authority held an event here last week to remember the 24,390 people killed on Irish roads, since records began.
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Britain's Prince Andrew says he was at a pizza restaurant on the night he is accused of having sex with a 17-year-old girl.
Virginia Roberts-Giuffre says she met the Duke of York at a nightclub in London before they slept together in 2001.
Speaking to BBC's Newsnight, he categorically denied Mrs Roberts-Giuffre's accusations and also said he didn't regret his friendship with the convicted sex offender Jeffrey Epstein - who died in prison earlier this year.
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Hong Kong police say one of their media liaison officers was hit in the leg by an arrow in a standoff with anti-government protesters around a barricaded university.
Activists threw petrol bombs - some of them by catapult - and shot arrows with bows at police.
They responded with tear gas and water cannon at the Polytechnic University in Kowloon.