Sweden school attack: horror as sword attacker kills teacher and pupil

• Masked attacker posed for picture with students before killing spree• Assailant, who was shot dead by police, said to have far-right sympathies • Premier calls attack a ‘black day’ for country as two patients remain criticalSweden has reacted with shock and horror after a teacher and pupil were stabbed to death in a school with a high number of immigrants by a masked man who was reported to have far-right sympathies. The man, who posed with students before starting h