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This is the shocking moment a man dressed as Marvel comics character Winter Solider was arrested in London's financial district on suspicion of having a firearm, sparking fears of a terror attack.

Heavily armed police swarmed on Canary Wharf this afternoon after reports of a man walking across a bridge on the North Dock, apparently armed with a shotgun.

Mirror Online obtained exclusive footage of the suspect being marched into a waiting police van.

He had dyed red hair, a leather jacket and his arm was covered in silver material.

(Image: Daily Mirror) (Image: Daily Mirror)

It is believed the man was dressed as the Winter Solider, a character from the Marvel comics series who featured in the 2014 smash hit Captain America.

A Film and Comic Convention was scheduled to take place in Brighton on Satuurday.

A witness said he feared a terror attack was unfolding.

He said: "Word spread around Canary Wharf of a man armed with a shotgun - your mind immediately jumps to terrorism in the current climate.

"We saw armed police gathering at the dock but they didn't seem too concerned.

(Image: Daily Mirror) (Image: Daily Mirror) (Image: Daily Mirror)

"They didn't put up a cordon or keep people away so we assumed it wasn't too serious.

"Then I heard them shouting 'we've got him'."

The Canary Wharf Group later indicated that it is believed the firearm was an imitation.

The group tweeted: "Reports of man with firearm at Canary Wharf are incorrect.

"Man was carrying non-lethal Airsoft hobby equipment."

(Image: Tom Howell / Daily Mirror)

The Met police confirmed they arrested a man aged 29 on suspicion of carrying a firearm.

It is understood officers will assess the firearm to determine its capabilities.

In the Marvel series, the Winter Solider was a former ally of Captain America called Bucky Barnes, but after being seriously injured in the Second World War becomes a brainwashed assassin for super villain group Hydra.

He lost his arm and had it replaced with a cybernetic metal limb.

(Image: Marvel)

The Met police said in a statement: "A man has been arrested in the Canary Wharf area after police were called to reports of a person in possession of a firearm.

"Police received the reports at approximately 14:15hrs on Saturday, 7 November.

"Police officers, including armed officers, attended the location and a 29-year-old man was arrested shortly before 15:00hrs at West India Quay station on suspicion of possession of a firearm. He has been taken to an east London police station where he remains in custody.

"While we await analysis of the weapon recovered, it is believed to be an air rifle."