A group of Good Samaritans saved a woman and arrested a man following an alleged sexual assault on a bike path in Melbourne's inner north.

The attack on Sunday night occurred about 300 metres from where Jill Meagher was raped and murdered in Brunswick in September 2012.

The three bystanders chased and apprehended a 20-year-old Coburg man who will face court on Tuesday charged with intent to commit a sexual offence, sexual assault and unlawful assault.

One of those involved in the citizens' arrest spoke to Fairfax Media but asked not to be identified.