Swiss police issued an global arrest warrant on Tuesday for a chainsaw-wielding attacker who remained on the run after wounding multiple people in an office building rampage.
The attack began in an insurance office in the historic Swiss town of about 34,000 people near the German border.
Authorities said the suspect has previous convictions for weapons offences and has no fixed residence.
On Monday afternoon, police said they had located the Volkswagen minivan the suspect was believed to have driven.
Police said the attack was "not an act of terror".
She says it's not clear who the other three wounded people are and the company is checking to see if they customers.
Franz Wrousis, 50, was arrested in Thalwil, a town about 60km (37 miles) from Schaffhausen, the border town where the incident took place.
Despite relatively low crime rates, Switzerland has one of the highest rates of firearm ownership in the world and police said it was likely that the suspect was carrying weapons. The victim with the most serious wounds is now out of danger, police said according to the BBC.
Sticher described him as a 190 centimeter-tall (6 feet 2 inches tall) bald white man, while police described him as a man of "untidy appearance".
"We have information that this man is unsafe, that he is aggressive and, shall we say, psychologically disturbed", Landolt added.
Armed police stand guard at the scene of the attack in central Schaffhausen.
They later released another photo of Wrousis, which they said was taken immediately before the attack.
A local official in Zurich canton, Ruedi Karrer, told 20Minuten he had seen Wrousis in the Uhwiesen forest while walking his dog and believed the suspect had been staying there for about two weeks.
They did not say what was inside the van, which had registration plates from Graubuenden, or elaborate on its condition.
"He may have been a little odd, but he wasn't unfriendly", she said.
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