Just before 1am, police were alerted to a property in Tyresö, south of Stockholm, when three people were stabbed.
"It is in connection with a party and we have prepared a report of serious robbery and attempted murder," said police officer Jenny Ryberg.
How did it go?
- I do not want to influence witnesses, so I do not comment further on the case.
Do you have any suspects?
- It's too early to say.
The three people have been taken to hospital.
In Vallentuna, north of Stockholm, a person has been taken to hospital following a suspected murder attempt.