"She was not just my daughter, she was my angel. She was a just and fair human being. There were so many who loved her. She was my daughter, my friend, my mate," Mrs Mezher told GoteborgsPosten.
Alexandra was the daughter of a Lebanese immigrant who came to Sweden in 1989 from Beirut.
Police spokesman Christer Fuxborg said two people were holding down the male suspect when police arrived on the scene. He said a 22-year-old woman later died of her wounds. Police arrested a suspect.
Fuxborg said there were signs of a violent fight at the home, which houses about a dozen 16- to 18-year-old migrants and other youths. He couldn't give further details pending a police investigation.
Police union director Lena Nitz told Swedish press "It is obvious that the migrant situation is a great strain. The situation is completely unsustainable."
- Telegraph, DailyMail, AP, nzherald.co.nz