Police have identified the man they believe injured five people, two seriously, with a chainsaw in the northern Swiss city of Schaffhausen on Monday.
Swiss authorities identified the suspect as 51-year-old Franz Wrousis, whom they said has two previous convictions for violations of weapons laws.
Police warned "the suspect is dangerous" and said it not "terrorist"-related. Authorities added that they have deployed numerous officers to the area to search for the suspect.
Two of the people injured in the attack worked at an insurance company, according to the Swiss newspaper Blink. The two employees have been taken to the hospital and are undergoing operations.
Cindy Beer, a spokesperson for the police department in Schaffhausen, told SRF television "we can't say exactly what happened at this point."
The Associated Press contributed to this report.