germany train accident
Members of emergency services work at the site of the two crashed trains near Bad Aibling in southwestern Germany, February 9, 2016 Reuters

Four people were killed in Germany as two trains collided head-on in the southern state of Bavaria on Tuesday.

The collision, which occurred on a single track, left 150 people injured. The condition of ten people is reported serious.

Police have launched an investigation into the accident, Reuters reported.

The crash, which involved two local passenger trains, happened at 6.48 a.m. local time near Bad Aibling in south-east of the country.

The trains' operator Meridian said the carriages had partially derailed and crashed into each other.

"This is the biggest accident we have had in years in this region and we have many emergency doctors, ambulances and helicopters on the scene," police spokesman Stefan Sonntag told the AFP.

"The accident is a huge shock for us. We are doing everything we can to help the travellers, relatives and workers" a senior Meridian official said, BBC reported.