A 56-year-old man has been arrested after callously pushing a woman onto train tracks in Hong Kong.

CCTV footage from a train station in Yuen Long shows a 59-year-old female railway station worker standing on the platform awaiting a train.

In the clip, which has since gone viral on social media, the man appears to calmly walk behind the woman.

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The man appears to calmly walk behind the woman at a train station in Hong Kong

Without any provocation, he then savagely pushes the woman onto train tracks below.

As the sickening attack happened so quickly, the woman was unable to brace herself for the fall.

The cleaner remains motionless on the tracks as the man calmly walks away without a second glance.

Luckily, all incoming trains were stopped by the station staff in time. The victim reportedly got back to the platform shortly afterwards.

As he approaches her, he viciously pushes her without warning onto the train tracks below

As the attack happened quickly, the woman, a cleaner, was unable to brace herself for the fall

The attacker has been identified as a 56-year-old man originally from Pakistan. He has been arrested and charged with one count of wounding

According to HK01, the victim, surnamed Leung, was working as a substitute cleaner at the Yuen Long Light Railway Station in New Territories when the incident occurred on October 21.

The attacker approached Ms Leung from behind as she was working on platform 5.

After he pushed Ms Leung onto the railway tracks, staff at the station rushed to the control centre and stopped trains from entering the station.

Ms Leung managed to get back to the platform shortly after.

The cleaner is seen laying motionless on the tracks as the man calmly walks away without a second glance

The shocking attack occurred at the Yuen Long Light Railway Station in Hong Kong (pictured)

Her colleague dashed over to platform 5 and reported the incident to the police.

Ms Leung was taken to hospital with bone fractures on her left elbow and a laceration on her chin.

The police caught the suspect at Choi Uk Tsuen 20 minutes later after receiving a report of a drunk man lying on a public street.

Wan King-hang, chief inspector of Yuen Long district, confirmed at a press briefing that a case of wounding occurred at about 10:30am.

Police arrived the scene and conducted an initial investigation.

After a sweep of the area around the station, the police arrested the Pakistani male, aged 56, reported to be unemployed, according to Wan.

Wan also stated that the suspect was not acquainted with the victim.

It's believed that the man pushed the woman off the platform under the influence of alcohol.

According to The Standard, the suspect appeared at Tuen Mun Magistrates' Court on October 23.

He is remanded in custody as the case is adjourned until December 18.