The Stockholm offices of games firm Starbreeze have been raided by the Swedish Economic Crime Authority (ECO).
The news was confirmed to GamesIndustry.biz by ECO, who said that one person had been arrested in the search.
In its financials for Q3 2018, the company revealed that its losses had tripled to $11.3m.
"This morning officals from the Swedish Economic Crime Authority raided the offices of Starbreeze in Stockholm," the organisation said.
"One person was arrested and items were seized. The raid is part of an ongoing investigation involving suspected insider trading."
Meanwhile, Starbreeze added: "On Wednesday Swedish Economic Crime Authority has conducted a search query at Starbreeze AB. The company has been informed that this has occurred due to suspicions of insider charges. The company as such is not subject to any suspicion. The company cooperates full with the Swedish Economic Crime Authority. The event does not affect the company or the ongoing business reconstruction.