Sweden sword attack: Two killed by masked attacker

A masked man armed with a sword has killed a pupil and a teacher at a school in Sweden.

The suspect, clad in black, apparently posed for photos with students ahead of the attack, in the western town of Trollhattan.

Two further victims, a pupil and a teacher, are seriously injured. The attacker was shot by police and has died of his injuries. He was 21 and resident in Trollhattan, police said.

The king has said Sweden "is in shock".

Eyewitnesses described chaos at the school, with hundreds of students fleeing from the building screaming.