A 19-year-old man attacked a school in Athens with a hammer and a knife. The director and a student of the institution were injured. Police officers arrested the male attacker. Earlier, Fox News reported that at least eight schoolchildren were injured in a shooting in Philadelphia. The victims received minor injuries, but they were taken to hospital for first aid. The attacker is the brother of one of the students, ERT reported. The incident occurred in the district of Patisia.