Officers went to Gillam Road after a man set fire to something in a garden - a bomb disposal team's assessing the items.
Southampton Cruise Business Booming
Figures out show 1.5 million people passed through Southampton last year, making it Europe's busiest turnaround port.
Each ship that comes into the port is thought to be worth around £2.5 million to the city's economy and it's good news for employment too; the industry supports more than 11,000 jobs across south east England.
The figures, from the Cruise Lines International Association show spending on cruises in the U.K. last year rose 3.7% to £2.49 billion, and the industry's contribution to the economies of Europe was also up in 2012 - rising 3.4% to £13.15 billion.
Britons took more than 1.7 million cruise holidays last year, with the UK staying Europe's biggest cruise market with a total share of 27.7%.
CLIA UK and Ireland director Andy Harmer said: "These figures demonstrate the continued and growing strength of the British cruise market."
Tens of thousands of people lined the harbour to welcome HMS Queen Elizabeth to her home port for the first time.
Lanes will be added on Junction 9 slip roads, the Parkway South roundabout and Whiteley Way approach.
In a UK first, Hampshire firefighters are teaming up with police in a six-month trial.
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