![Swedish battery group Northvolt's battery mega-factory under construction in Skelleftea, Sweden. Northvolt / AFP](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/QHZUR3RTQUY4DPWHGEA6Z543UM.jpg?smart=true&auth=64b190dde3d517fc8cac725188e1476f15ad35a08adb864eaeffee3654367561&width=400&height=225)
Swedish battery group Northvolt's battery mega-factory under construction in Skelleftea, Sweden. Northvolt / AFP
Swedish battery group Northvolt's battery mega-factory under construction in Skelleftea, Sweden. Northvolt / AFP
Investigation launched into unexplained deaths at Swedish electric car battery plant
Forensic examinations did not establish why three employees died at the factory