A knife-wielding man went on a rampage and attacked pedestrians at random early Saturday, wounding 19 people, four of them seriously, police said.
The 17-year-old suspected attacker was arrested, a police spokesman told The Associated Press.
The man had mingled with crowds after a ceremony inaugurating Berlin's new central rail station before he began to randomly attack people.
A police spokesman said 11 ambulances were called to the scene.
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