Ivana Bacik is set to be elected to the Dáil after topping the poll in the Dublin Bay South by-election.
After a disastrous result for Fianna Fáil TD Jim O'Callaghan has said the party will need to think about whether Micheál Martin leads it into the next election.
Labour's Ivana Bacik is leading the field on the first count at the RDS. Her party leader Alan Kelly saying it's a great day for Labour.
Bacik took 30 per cent of the vote, with Fine Gael's James Geoghegan second on 26 per cent - though he's highly unlikely to catch her on transfers.
The big story emerging is the poor performance of Fianna Fáil, with Deirdre Conroy getting just 4.6 per cent of the vote.
Her campaign manager and sitting Dublin Bay South TD Jim O'Callaghan was asked if Micheál Martin is now the right man to lead Fianna Fáil into the next election. He said "we'll have to think about that".
Counting continues at the RDS, with a result expected late tonight.
