BERLIN (AP) — A train accident in the Alps in southern Germany on Friday left at least four people dead and many more injured, authorities said.

Police said the regional train headed for Munich appeared to have derailed shortly after noon in Burgrain — just outside the resort town of Garmisch-Partenkirchen, from where it had set off. Three of the double-deck carriages overturned at least partly, and people were pulled out of the windows to safety.

Police said on Twitter that four people were killed. They put the number of injured at about 30, 15 of whom were seriously injured and taken to hospitals.

The cause of the derailment was still being investigated. It wasn’t clear how many people were on the train at the time, but officials said several students were on board heading home from school for the Whitsun holiday.

Bavaria’s governor said he was shocked and saddened by the disaster. “We grieve with the relatives of the victims and wish all who were injured a speedy recovery,” he said.

“The students in particular were looking forward to the holidays,” he said. “Lots of respect and thanks to the rescue services for their swift help.”

The line between Garmisch-Partenkirchen and Oberau, north of the accident site, was closed. The area is near the Austrian border.

Train travel is popular among commuters and tourists alike in Germany, which has a dense network of local and long-distance trains.

While accidents are rare compared to road travel, there have been several fatal rail incidents in recent years.

A train dispatcher was sentenced to 3½ years in prison over a 2016 crash that killed 12 people in Bad Aibling, about 80 kilometers northeast of Garmisch-Partenkirchen. The dispatcher admitted playing a game on his phone shortly before two trains collided on a single-track line.

Earlier this year one man died after the driver of a commuter train south of Munich ran a stop signal, resulting in a collision with another train.