July 27 (UPI) -- A passenger train derailed in southwest Germany on Sunday night, killing at least three people and injuring 34, including three seriously, according to emergency services.

A landslide from a storm sent debris on the tracks, causing the front of the train to derail, soar 16 feet up a slope and crash into trees at 6:10 p.m. local time, Schwabisch Media reported.

The crash occurred at Riedlingen near Stuttgart in the state of Baden-Wurttemberg. That is 98 miles west of Munich.

Operator Deutch Bahn said the crash was caused by "unknown reasons," according to the BBC. The train departed Sigmaringen at 5:33 p.m. local time and was headed to Ulm.

The Regional Express 55 contained about 100 occupants when two details derailed, Germany news agency dpa reported.