The incident occurred on a Thane bound train from Chhatrapati Shivaji Maharaj Terminus station, in the compartment allotted for differently-abled passengers.
A video shot by one of the commuters, which has gone viral on social media, shows the man dragging the woman by her hair and then attempting to strangle her.
The accused identified as Rafiq Khan, was a cab driver from Byculla who had known the victim. He owed her money over which both of them had an altercation.
Dadar Senior Inspector Nitin Bobde said that "the woman had lent money to her attacker on a friendly basis as she had known him over a few years."
Khan was taken into custody by the GRP police team from Dadar after he deboarded. The victim registered a complaint after which he was arrested early on Friday.
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