The warning came to the police on Monday before 18:00.
"It is a caller who tells us that there is a knife-cut man on the ground at a tram stop in Kortedala," says Peter Adlersson.
The suspected offender should have left the site by jumping to the city with a tram, police say.
According to the first information from the site, the knife-cutting man is not life-threateningly injured.
– But he is cut into the hand, the leg and the head. We are looking for the perpetrator completely, "says Peter Adlersson at 6.15 pm.
Several patrols and police helicopters participate in the hunt.
The police have initiated an initial investigation into attempted murder and have been blocked by the technical investigation site.
The text is updated