The fatal accident occurred on December 14 during the construction of a weather shelter on the Northvolt site. A fork attachment came loose from a telescopic handler and fell on the two workers.
The following day, Arbetsmiljöverket was called to the battery factory to inspect the site of the accident. In its report, the agency said there were areas where the subcontractor, NCC, needed to improve.
"You need to investigate and assess the work before you resume. Such an assessment is necessary to ensure that the necessary measures have been taken," Arbetsmiljöverket wrote in the report.
"Based on the risk assessment, all necessary measures must be taken to prevent injuries and accidents," the report says.
Arbetsmiljöverket is now demanding that NCC remedy the deficiencies. Failure to do so could result in an injunction or a ban.
Amelie Winberg, press officer at NCC, writes in an e-mail to Norran that "safety is always the highest priority."
"We are deeply saddened by the accident in December in which a colleague lost his life. We are cooperating with Arbetsmiljöverket in its investigation. As we move forward with the project, we have changed working practices and reviewed both procedures and risk assessments to prevent a similar accident from happening again. Our own investigation into the accident is ongoing and we are working to identify all the reasons why the accident occurred," she writes.