TV3 is running extended coverage though I don't know if they continued News at 5:30 or broke into SOCS.
Incidentally the only reason I know they did at all is that RTE decided that right in the middle of Simon Covney's concession speech was a good time to go to commercials.
TV3 continued News at 5:30. I assume RTE weren't expecting the count to run over, as they extended their News Special by five minutes.