Increased police presence in Southampton over weekend
More police officers will be on patrol across Hampshire and the Isle of Wight over the weekend to deter any troublemakers, police said.
Hampshire police said there was nothing to suggest there would be any riots but extra officers would be put on the streets to reassure the public.
Ch Supt David Peacock said there would be "robust" action.
Hampshire also sent officers to assist the Metropolitan Police with the rioting in London.
Ch Supt David Peacock said: "I have a very clear message to anybody who has any intention of causing any disorder. Don't bother.
"We are very prepared for anybody who thinks that it's acceptable to commit violent acts to the detriment of everybody else.
"Put simply, this behaviour will not be tolerated and I have made it very clear to all officers and staff working this weekend that they are to take robust action to stamp out any trouble."
Some shopkeepers in Southampton's city centre closed their shutters on Tuesday afternoon amid unfounded rumours of trouble, but they were soon reopened.
Ch Supt David Peacock continued: "We are recalling to duty our neighbourhoods, response, roads policing and custody officers from their rest days but we are not cancelling annual leave.
"Everyone in the constabulary at every level is investing an enormous amount of effort into putting our communities first in a way that those responsible for disorder don't."