OSLO: An 18-year-old Norwegian is suspected of terrorism after the murder of a social worker in Oslo which may have been racially-motivated, authorities said Monday.

The woman, who worked in a home helping integrate vulnerable young people into society, was killed overnight Saturday to Sunday at her workplace. According to media, she was stabbed to death.

Lawyers representing the family identified the victim as 34-year-old Tamima Nibras Juhar, born in Ethiopia.

The suspect, a resident at the home, was arrested in Oslo after the attack and has admitted to playing a role in the murder, police said.

Police said Monday the preliminary charges against the suspect had been expanded to include terrorism.