Workers strike at Peru's biggest copper, zinc pit

LIMA, June 30 (Reuters) - Peruvian workers went on strike Monday at the sprawling Antamina zinc and copper mine owned by BHP Billiton (BHP.AX: Quote, Profile, Research)(BLT.L: Quote, Profile, Research) and Xstrata (XTA.L: Quote, Profile, Research), a union official said.

"All operations are stopped at Antamina," union leader Francisco Marino told Reuters.

The mine is one of the world's largest copper-zinc pits. (Reporting by Dana Ford; Writing by Terry Wade; Editing by John Picinich)