A man who allegedly randomly attacked five women with a knife and pushed four of them onto the tracks at a Melbourne train station has been charged with attempted murder.

Five women, including two aged 81, were injured after an armed man allegedly shoved them onto the tracks at Glenhuntly Railway Station about 11.15am.

Emergency services initially received reports that a man had stabbed a woman's handbag with a kitchen knife.

Police believe the knife broke in half and the man proceeded to push another four women off the platform and onto the tracks.

Witness Kelly Wang told 9NEWS she was “so scared” watching the alleged assault unfold.

Police have arrested a man after four women were allegedly pushed onto the tracks at Glen Huntly train station. (9NEWS)

Authorities allege the attack occurred around 11.15am. (9NEWS)

“He was very calm… he didn’t say a word,” Ms Wang said.

“I was so scared that I ran,” she added.

Another witness, Wesley Law, spoke with one of the victims who had been “picked up and thrown”.

“I could see that she was quite shaken up… her hands were trembling, (she) lost her shoe as well,” Ms Law said.

Three women, two aged 81 and another aged 71, sustained series injuries and remain at The Alfred Hospital.

Another two women, aged 36 and 25, suffered minor injuries and were treated at the scene.

Police say the ordeal went on for just 90 seconds, with the man seen running from one part of the station to the next.

A 47-year-old man from Carnegie was arrested and charged with four counts of attempted murder, intentionally causing serious injury, affray and making threats to kill.