Overview

• The stabbing occurred at about 12:25 a.m. Sunday after two men from a group allegedly harassed female passengers on a Dresden tram, police said.
• A 21-year-old U.S. citizen stepped in and was injured with a knife during the confrontation, according to a police spokesman.
• Police have arrested a 21-year-old Syrian national on suspicion of involvement, but investigators have not established whether he was the attacker.
• A second man remains at large as police investigate him and an unidentified individual on suspicion of grievous bodily harm.
• Images from the scene show blood inside the tram, and the victim was taken to a hospital with no official update on his condition.