THIS is the dramatic moment an armed cop stopped an innocent passenger at gunpoint.

The man was ordered off the train and told to lie on the platform - as the police shooter stood over him.

Shocked passengers watched as the man was then frog-marched into a toilet where he was searched and interrogated.

He was released minutes later without charge after it became clear they had apprehended entirely the wrong man.

The armed officers were called to Bournemouth railway station in Dorset to arrest a suspect.

An officer travelling on the train wrongly identified the 21-year-old passenger as being a wanted man and tipped off colleagues.

Dorset police confirmed the man was detained by mistake and he was now being offered appropriate support.