It was at Howth Junction - a station on the DART (Dublin Metro).
The good news is that the young woman was only shaken and was rescued by other passengers and the single security guard present.
The bad news is that this is only the tip of the iceberg for bad behaviour at this notorious station and that DART security and the Gardai appear to be unable/unwilling to get a grip on these louts.
Nothing I've read here in Ireland suggests that travellers were involved - just 'normal inner-city louts'.
[ see my link at the end of the previous page ]