The alarm came at 06.05 on Saturday morning. Two men in their 20s had jumped over the fence and were inside Örlogshamnen in Karlskrona.
Both could be taken care of immediately by the security guards of the defense and handed over to the police.
The men have now been arrested and are suspected of trespassing and breaching the Protection Act, a crime that can result in imprisonment for a maximum of two years.
Both men are also suspected of their own use of drugs.