Three Northvolt employees in Skellefteå have died shortly after their work shifts, prompting a police investigation.

The deaths occurred over a span of just over a month, with each being discovered at home.

Initial findings did not suggest foul play, but a third death has led authorities to explore potential environmental causes at the battery factory.

Police are investigating all three cases comprehensively.

The environmental crime unit in Umeå has recently joined the investigation.