The German teenager who shot dead 15 people in a school massacre boasted about what he was going to do the night before in an internet chatroom, police said today.

A 17-year-old gunned down students at his former high school – some of whom died with their pencils still in hand – in a spree that ended with 15 dead before he took his own life, German authorities said.

A teenage gunman in combat clothes ran amok at a German school today killing 15 people, nine of them pupils, before apparently shooting himself.

A teenage gunman shot dead 15 pupils, staff and bystanders at a German school before apparently turning his pistol on himself today.