NEW YORK (Reuters) - The dollar was little changed against a basket of currencies on Monday as Federal Reserve Chair Janet Yellen said she still expected gradual U.S. interest rate increases following a weak jobs report, but raised concerns about Britain's referendum on its membership in the European Union.

The dollar index <.DXY>, which measures the greenback against a group of six currencies, rose briefly on Yellen's rate-hike comment before turning modestly lower. It was last down 0.1 percent on the day at 93.925.

(Reporting by Richard Leong; Editing by James Dalgleish)