Police say knife attacker injures 4 at Oslo school

OSLO (XINHUA) - A knife-wielding attacker injured four school employees in Oslo, Norway, on Tuesday (March 19), media reports quoted police sources as saying.

According to the report, police said they have arrested the attacker.

The four injured, a teacher and three other staff members, have been taken to hospital.

The motive of the attacker remains unclear, the report said.