Police have arrested and released a man in relation to a sexual assault in broad daylight in North Fitzroy.

Investigators have been told a woman was sexually assaulted while jogging on Queens Parade about 1.30pm on August 17.

Police released this photo of the alleged perpetrator.

The 35-year-old Collingwood man handed himself in to police at 6.30pm this evening and was interviewed then released pending further inquiries. A police spokesman said the investigation was "ongoing."

The victim told police a man on a push bike blocked her path then chased her and sexually assaulted her.

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The woman snapped a picture of the man on her phone. Police released an image of him.

Police are urging anyone who may have further information to contact Crime Stoppers on 1800 333 000.