A fire on Wednesday at Nexa Resources' (NEXA.N) Cajamarquilla zinc ​smelter in Peru has been brought under ‌control, though the blaze left several workers injured.

In a statement sent to workers seen by Reuters, ​Nexa said those affected included one ​of its own employees and three workers ⁠from contractor Hitachi (6501.T), which had been carrying ​out work in the area.

Three of the injured ​were taken for evaluation and treatment and were in stable condition, while a fourth person was treated ​on site, the company said.

Nexa said it ​evacuated workers from the affected areas as a precaution ‌and ⁠activated emergency and safety protocols with support from local firefighters.

The company said the causes of the incident were under investigation.

Local media, citing ​firefighters, said ​the blaze ⁠began at around 7:17 a.m. local time (1217 GMT) at the Cajamarquilla ​facility in Lurigancho-Chosica, east of Lima, ​and ⁠affected electrical equipment at a transmission substation.

Cajamarquilla is the largest zinc smelter in Latin America. ⁠The ​firm has earmarked around $22 ​million for renovations at the site in 2026.