A woman from Caerphilly staged a track-side protest after football fans hurled abuse at her during a train journey with her family.
Lisa Robinson was on the train with her husband and son, five, when they were verbally abused by Cardiff City fans after a win over Millwall.
She pulled an emergency handle to stop the train, but the driver decided to continue the journey.
When the train did eventually stop, Mrs Robinson stepped onto the tracks until the police arrived.
Speaking to ITV Wales Carl Edwards Mrs. Robinson described the language used by fans on the mid-afternoon train as “obscene and abusive” but she felt compelled to do something after she and her family had to deal with the abusive over the course of their journey.
The 41-year-old said she spent 20 minutes on the tracks, until police arrived, preventing the train from moving while the fans continued to hurl abuse at her.
British Transport Police said: “BTP officers attended Ystrad Mynach railway station after a report that a woman had been verbally abused by a group of football fans after she challenged their behaviour on board the train.
“BTP does not tolerate anti-social behaviour of any nature on the railway network and will do everything it can to identify offenders and bring them to justice.”
Peter Northcott, head of stations at Arriva Trains Wales, said: “We take all complaints very seriously and I personally contacted Mr and Mrs Robinson on the day of this incident.
“A full investigation is taking place with the British Transport Police.”
Other passengers are being advised not to follow Mrs. Robinson’s actions as standing on rail tracks is extremely dangerous.