Two passenger trains have collided in the German state of Bavaria, with police saying several people have been killed and scores injured.

The 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.

It is believed the trains collided head-on. Emergency services with rescue helicopters are at the scene.

The exact number of casualties was unclear but a tweet by Bavarian police (in German) said there were several fatalities and about 100 injuries.

The cause of the collision is not yet known.

Roads around the scene have been closed and the railway line between Holzkirchen and Rosenheim is blocked, local media reported.

Regional police said in a tweet (in German) that eight people were dead and about 100 injured, of whom 50 were seriously hurt.The drivers of both trains and two train guards were among those killed, regional broadcaster Bayerischer Rundfunk said, quoting police.

Rainer Scharf, of Bavarian police, said that "given the severity of the accident, we believe the two regional trains collided head-on at a low speed".

Regional train company Meridian said in a statement that "a tragic accident" had occurred on a single-track route between Rosenheim and Holzkirchen at about 07:00 local time (06:00 GMT).

Bernd Rosenbach, managing director of Bayerische Oberlandbahn, which operates Meridian trains, told reporters: "The accident is a huge shock for us. We are doing everything we can to help the travellers, relatives and workers."

Technical manager Fabian Amini added: "Our thanks go to the emergency services and workers who gave their help so quickly."

The scene of the crash is close to the Mangfall river in a hilly and densely wooded region. Casualties were being evacuated by boat and by helicopter.

Several hundred emergency services personnel were at the scene and rescue teams from nearby Austria were also helping, local media said.

Although the trains were carrying commuters, local carnival holidays meant no schoolchildren were on board, according to reports.

The cause of the collision is not yet known.

Roads around the scene have been closed and the railway line between Holzkirchen and Rosenheim is blocked.

German Justice Minister Heiko Maas tweeted (in German): "Really awful news from #badaibling - our thoughts are with the victims and injured. Thanks to the rescue workers".

Courtesy BBC