Police in Germnay say two passenger trains collided head-on in the German state of Bavaria on Tuesday.
There are reports of several people dead and scores injured.
BBC reported that the crash happened at Bad Aibling, a spa town about 60km south-east of Munich.
Other media reports suggested that one of the trains had derailed causing several carriages to overturn.
Emergency services with rescue helicopters are at the scene.
Police spokesman Martin Winkler said: “We are now talking about 100 people who are slightly injured, a number of seriously injured people and several dead.”
German news agency DPA reports that eight rescue helicopters are standing on a lawn near the entrance to the town and that rescue workers are on their way to the scene.
Roads around the scene have been closed and the railway line between Holzkirchen and Rosenheim is blocked, local media reported.