Copper fell to a four-week low on speculation that unrest in North Africa and the Middle East will derail recovering economies as oil prices jump.
Copper futures for May delivery dropped 8.5 cents, or 1.9 percent, to $4.278 a pound at 10:16 a.m. on the Comex in New York. Earlier, the price touched $4.265, the lowest since Jan. 26.
Copper for three-month delivery dropped $175, or 1.8 percent, to $9,405 a metric ton ($4.27 a pound) on the London Metal Exchange. Nickel, lead, tin, zinc and aluminum also fell.
Libyan leader Muammar Qaddafi vowed to fight a growing rebellion until his “last drop of blood” as bodies were left in the streets of Tripoli, the capital. Protests toppled presidents this year in Tunisia and Egypt. Oil jumped to the highest since October 2008 on supply concerns. The MSCI World Index of shares retreated for a third day.