A light aircraft and a helicopter on Tuesday collided with each other in the air near the western Germany city of Karlsruhe, killing four people, police said.
The police of Karlsruhe said on its Twitter account that it was a collision between a rescue helicopter and a sport plane, reports Xinhua.
Rescue workers, firefighters and several rescue helicopters have been deployed at the accident site.
German media Focus Online reported that the collision took place in the sky between Rheinhausen and the Erlichsee. The accident site was reported to be near a gravel pit.