La Oroya hospital director Elias Lazo tells Canal N television that the 41-year-old who died suffered a chest wound. Fifteen people were seriously hurt with gunshot wounds.
Video broadcast by the station showed police firing pistols yesterday as they retreated behind shields under a shower of rocks.
The protesters are demanding eased environmental standards so a buyer can be found for the Doe Run metallurgy complex. Otherwise it will go into liquidation with 2,400 jobs lost.