Two passengers were 'doing lines of cocaine' off the table on a Dublin-Cork train, according to a complaint lodged with Irish Rail.
It received 26 reports of antisocial behaviour on this route in the past 18 months - and several relate to drug use.
A 19-year-old girl said three teenage boys threatened her - with one saying he'd hit her on the head with a machete.
Dermot O'Leary, from the National Bus and Rail Union, says dedicated transport police is needed.
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6:00am - 8:00am
The Wicklow Way with Nikki Hayes
Sunny intervals
High: 19°C | Low: 16°C
Sunny intervals
High: 18°C | Low: 16°C
Sunny intervals
High: 19°C | Low: 15°C
Sunny intervals
High: 18°C | Low: 15°C
Sunny intervals
High: 19°C | Low: 15°C