Swiss police said on Monday that they arrested a 43-year-old suspect in relation to a deadly shooting incident at a rave in the town of Aarau on the weekend.
"Investigations into the exact circumstances of the incident, as well as its background and possible motive, are currently underway. At this stage, it is assumed that a single perpetrator was involved," police in the canton of Aargau said in a statement.
At least one person was killed, and five were severely wounded, during the Sunday morning shooting at a Swiss nightclub in the city of Aarau, local authorities said.
According to reports by the Swiss newspaper Blik, one person was killed when gunmen entered the party, which was being held at the city's horse racing track.
Italian citizen killed
Blik also reported that the victim who was killed was a 22-year-old woman identified only as "M." by the party organizers.
According to Italy’s Foreign Ministry, the one victim who was killed was an Italian citizen.
All the victims are Swiss residents, and in their 20s, police said, adding that a manhunt was underway and large areas of the town had been cordoned off. They appealed to the public for any images of the incident.