A video has appeared online showing a woman standing up to a group of men who was seen harassing a female victim at a taxi stand outside Orchard Towers.
A contributor alerted citizen journalism website Stomp to the video, which was filmed and posted on Facebook by user Zyra Lim.
According to Ms Lim, the incident took place while she was queuing at the taxi stand.
In her Facebook post on Nov 1, she said: "Before I took this video, the guy wearing the green shirt choked the girl sitting in front of him."
She explained that she and other people at the taxi stand tried to stop the men from bullying the girl further.
"I threatened to send the video to the authorities," she wrote.
"These guys would have been more abusive if I did not take the video. I am not trying to interfere but please do not abuse anyone physically, especially in a public place," Ms Lim added.
Visit STOMP for more stories.