It was during the night until Wednesday that the large single-storey property in the southern hospital area in Ängelholm burned.
A total of five of 19 buildings were affected - including preschools and a nursing home.
SVT has previously reported that a 20-year-old man has been arrested on suspicion of aggravated arson.
One of the men admits the crime
On Friday morning, the 20-year-old was requested to be detained - so is an 18-year-old man.
Prosecutor Ulrika Ekvall tells SVT.
- One admits, one denies, she says.
Who admits the crime?
- The 20-year-old, says Ulrika Ekvall.
See the devastation after the big fire:
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See pictures of the devastation from the big fire in Ängelholm from above Photo: SVT / Bernard Mikulic