WATCH: The dramatic moment Navy divers detonate the wartime bomb found near Portsmouth

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Here is the dramatic moment divers from the Royal Navy detonated a wartime bomb found in Portsmouth Harbour this morning.

The discovery of the Second World War 500lb device by the crew of a dredger at 3am today led to extensive road closures in the area, which have now been lifted.

The Royal Navy tweeted that the bomb had been taken out to sea and detonated off the coast of the Isle of Wight.

The video, taken by the Navy, shows divers carrying out the operation out at sea before a giant plume of spray and smoke erupts as the bomb is destroyed.

Go to 2:05 to see the moment the bomb is detonated.

All ferries in the harbour were stopped and trains between Portsmouth and Southsea station and Portsmouth Harbour were suspended.

The moment the bomb was detonated. Credit: Royal Navy/Twitter

The moment the bomb was detonated. Credit: Royal Navy/Twitter

A specialist Royal Navy disposal team towed the bomb out of the harbour just before 8am for detonation, but was delayed because of poor weather conditions.

It is the latest to have been dredged up during clearance work ahead of the arrival of the navy’s new super carriers.

A similar discovery last November led to a widescale evacuation of the area.

Before the all-clear was sounded, a Hampshire Constabulary spokesman said: ‘Our priority is to ensure public safety and minimise community disruption while the ordnance is detonated by the Royal Navy Explosive Ordnance Disposal. ‘Specialist teams will be looking to move the ordnance to a safe location this morning.

The bomb dredged up today. Picture: Royal Navy

The bomb dredged up today. Picture: Royal Navy

‘Residents in Portsmouth Harbour and Spice Island and surrounding areas are being notified and offered the relevant safety advice – to stay indoors, open any windows and move away from the outer walls of your house.

The Gunwharf Quays shopping centre opened for business when the all-clear was sounded this morning.