Two people have been injured in a sword attack at a school in Athens, Greek police said today.

Officers said an 18-year-old student injured his high school’s guard and the deputy principal.

They said it was not immediately clear why the teenager attacked the pair in the school north of the city centre, or why he used a sword.

Both the guard and the deputy principal suffered slight wounds.

The teenager, who police said was of Polish descent, was arrested. Authorities did not release his identity.

Serious attacks in schools in Greece are rare.