A manhunt is underway in Logan following a terrifying armed robbery.

A 21-year-old man was waiting at a bus stop on Kurrajong Drive at Marsden around 8.40pm on Thursday when he was approached by a man who appeared to be holding gun.

Police say the armed man demanded the victim’s bag before he allegedly fled the scene with it, heading towards the bushland of Chambers Flat Road Park.

Thankfully the victim was uninjured during the ordeal.

Police are appealing for anyone with relevant information, CCTV or dashcam vision to come forward.

Investigations are ongoing.

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