At least 10 others were injured in the accident near Ebenhausen-Schäftlarn station.
One person has died and at least 14 others were injured after two regional passenger trains collided near Munich.
German police said the incident happened shortly before 17:00 on Monday near the Ebenhausen-Schäftlarn station.
The two commuter trains apparently collided head-on along a single-track railway, south of the Bavarian city. One man -- an Afghan refugee in his 20s -- was confirmed dead.
National media have reported that around 100 passengers, including schoolchildren, were travelling on the two trains before the collision.
Police are investigating whether one of the train drivers involved in the fatal crash ran a stop signal.
S-Bahn Munich, the operator of the commuter service, said on Twitter that the railway line was closed with replacement bus services operating.
Passengers told the local newspaper Münchner Merkur that they had felt a violent shock and had been thrown out of their seats.
Bavarian Prime Minister Markus Soeder said he was shocked by the "terrible news" and thanked rescuers for their "quick response".