The head-on crash happened at Bad Aibling, a spa town about 60km (37 miles) south-east of Munich.
One of the trains was derailed in the crash and several carriages were overturned, German media reported.
Roads around the scene have been closed and the railway line between Holzkirchen and Rosenheim is blocked, local media reported.
He said the two regional trains had collided on a single track between Rosenheim and Holzkirchen shortly before 07:00 local time (06:00 GMT).
Although the train was carrying commuters, local carnival holidays meant no schoolchildren were on board, according to reports.
Little teaser image from the upcoming book.
This project will explore topics of love, lust, and beauty and will hopefully challenge the stereotypes and struggles that rise daily against the female form.
Again, fingers crossed and thank you all for your support and encouragement.