Dionne Callaghan told Global News she was riding the subway when a woman sitting across from her pointed at her and began yelling between Castle Frank and Donlands stations.
Callaghan said she initially couldn’t hear anything as she had headphones in, but then saw the woman take a marker from her child, and write the n-word on the train.
Callaghan exited the train at Victoria Park station and told TTC authorities about the incident, who said they would take the matter seriously.
She also later contacted police and filed a report with officers.
“This was a very overt racial attack on me, so it was a bit of shock and then sadness,” Callaghan said.
“Sadness at the fact that this women is teaching her child that this kind of behavior is OK.”
A photo appearing to show the graffiti was posted on Facebook.
TTC spokesperson Stuart Green confirmed to Global News they immediately began to investigate the incident and added that they received several other reports regarding the offensive marking.
Green said photos were taken before the train was cleaned and provided to Toronto police.
On Sunday, Toronto police said a woman was arrested in connection with the incident and charged with mischief and harassment by threatening conduct.
She was arrested at 11 a.m. on Sunday and released on an undertaking.
Police haven’t released the woman’s name out of concern for her safety.