In pictures: Italy ship crash

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image captionThe control tower in the Italian port of Genoa was reduced to rubble and a single, leaning staircase after a cargo ship slammed into it late on Tuesday night, killing at least seven people.
image captionThe ship that crashed was the Jolly Nero. It was manoeuvring out of the port at around 23:00 local time with the help of tugboats in calm weather.
image captionSome damage is visible on the stern of the container ship. The ship's owner, who arrived at the port soon after the incident, told journalists he was "utterly shocked".
image captionThe Jolly Nero is almost 240 metres (787 ft) long. Its captain is being investigated by prosecutors with a view to possible manslaughter charges.
image captionThe control tower was was more than 50m (164ft) tall. About 13 people were inside at the time of the crash, which happened during a shift change.
image captionThe tower crashed backwards into the water, pulling down buildings around it.
image captionRescue workers have been sifting through rubble on the dock and in the water. At least two people are still missing and four others were injured, two of them critically.
image captionThe BBC's Alan Johnston in Rome says the crash has revived memories of the accident involving the Costa Concordia cruise ship off the Italian island of Giglio in January 2012, which left 32 people dead.