The operations of Antamina, the largest copper mine in Peru, the world's second copper producing country, halted due to locals roadblocking the access to the mine. (See this article)This is part of a generalized social unrest which has caused conflicts between local communities and the mining companies. in this particular case, local protesters are demanding payment for the use of their land to transport the copper ore obtained by Antamina.
Antamina is situated in the Peruvian region of Ancash, at an altitude of 4200 meters (13800 feet) above sea level. It is owned by BHP, Glencore, Teck Resources and Mitsubishi.
The price of copper has been increasing and it very close to its all-time maximum of about 10000 US$ per tonne. (See this reference)