The man must be taken to the hospital by ambulance, but the extent of his injuries is unclear.

- Initially, the state of the injury was such that he was awake and able to speak.

I don't know how it is now, says Sebastian Börjesson, duty officer at the police to TT.

The police have an ongoing operation at the scene.

They also search with dogs and knock on doors to hear from any witnesses.

- No one has been arrested.

But we are working on all fronts, say the police.