Gold fell to a two-week low on Thursday as the last sweep of opinion polls before Britain's referendum on EU membership began gave the campaign to stay in the bloc a slight edge.
Britons were voting on Thursday in the referendum that has divided the nation. The polling will close at 5 p.m. EDT (2100 GMT), with results expected early on Friday.
Spot gold was down 0.33 percent at $1,261.70 an ounce after hitting $1,257.91, its lowest since June 9. U.S. gold futures settled down 0.5 percent at $1,263.10 per ounce, and last traded down 0.46 percent at $1,264.40.