Homes and a shopping centre were evacuated and ferry services halted from Portsmouth Harbour after a World War Two bomb was found in the water.
Trains between Portsmouth and Southsea and Portsmouth Harbour were also suspended.
The bomb, found by a dredger in the harbour at about 05:00 GMT, was towed out to sea and blown up at 16:00.
http://www.bbc.co.uk/news/uk-england-hampshire-37997259