European leaders warned Greeks that Sunday's vote on the country's international bailout was a referendum on its membership of the eurozone, insisting rejection could have disastrous economic consequences.
In the metals, the three-month unofficial copper price dropped 55 U.S. dollars, or 0.95 percent, to 5,726 dollars per tonne.
Nickel dropped to the lowest since April 2009 below 11,000 dollars a tonne, but recovered its lost at the end. The three-month unofficial nickel price was up 85 U.S. dollars, or 0.72 percent, to 11,925 dollars a tonne.
In other metals, the three-month unofficial aluminium price lost 8.25 dollars, or 0.49 percent, to 1,689 dollars a tonne. The three-month unofficial lead price lost 17 dollars, or 0.96 percent, to 1,757 dollars a tonne.
The three-month unofficial zinc price lost 25 dollars, or 1.24 percent, to 1,991 dollars a tonne. The three-month unofficial tin price lost 512.5 dollars, or 3.54 percent, to 13,962.5 dollars a tonne.