12 people injured in stabbing at Hamburg train station, authorities say

Authorities in Germany say an assailant stabbed people at the central railway station in the city of Hamburg, injuring 12 people _ six of them critically.

Police say a suspect in the Friday attack has been arrested. Hamburg's fire service said that six people sustained life-threatening injuries, while another three were seriously injured and three had slight injuries.

Authorities didn't give any details of the suspect, or additional details of the attack.