Rescue workers at the open emergency exit of the subway in Hamburg
Photo: Steven Hutchings / dpa
A subway in Hamburg hit an obstacle in the tunnel.
A fire department spokesman said that three people were slightly injured when the U1 line came to a full stop.
The train had been evacuated, said a spokeswoman for the elevated railway.
About 60 passengers would have sat on the train.
The traffic on the route between Kellinghusenstrasse and Stephansplatz was interrupted.
According to the fire brigade, there is an underground construction site in the area.
According to the fire brigade, a pipe is said to have been lying on the track.
kha / dpa