A 17-year-old youth has been sentenced to three years in a secure youth detention centre after being found guilty of murdering another teenager with a broken beer bottle in a schoolyard in Malmö last summer.

The mother of the murdered teenager told tabloid Aftonbladet that the sentence was far too lenient.

"It should have been prison. A life is gone and we will never get him back," she said.

It was August 6 last year when the 17-year-old victim was stabbed in the throat at Linné school in Malmö. The broken beer bottle severed a major artery.

Chief District Court judge...