Another man has been arrested, suspected of poisoning the cakes in Karlskrona, reports SVT Blekinge.
The man, who is said to be in his 25-year-old, is on probable grounds suspected of aggravated assault.
A man in his 20s has been arrested earlier on the same suspicions.
It was on October 16 that nine people became ill after eating cakes in an apartment in Karlskrona. Prosecutor Lena-Marie Bergström has previously stated that there was hash in the cakes.