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Britain's Home Secretary Theresa May has urged fresh action to combat anti-Semitism amid fears in the Jewish community following the terror attacks in Paris.

May said Sunday the hostage siege on the Jewish supermarket was a chilling reminder of anti-Semitic prejudice.

Speaking at a commemoration for attack victims, May said that she "never thought I would see the day when members of the Jewish community in the United Kingdom would say they were fearful of remaining here in the United Kingdom."

May says efforts to combat anti-Semitism must be redoubled because Jews are integral to Britain.

"Without its Jews, Britain would not be Britain, just as without its Muslims, Britain would not be Britain — without its Sikhs, Hindus, Christians and people of other faiths, Britain would not be Britain."