Swiss authorities announced the apprehension of a 43-year-old individual connected to a fatal shooting incident at a rave in Aarau over the weekend. The event, which took place at a covered horse racing track, resulted in the death of a 22-year-old Italian woman and injuries to five others in the early hours of Sunday.

Following an extensive operation, police arrested a Swiss man just before 1 a.m. on Monday, suspecting him of carrying out the attack. Investigations are ongoing to determine the exact details and potential motives behind the incident, with authorities suggesting a lone perpetrator may be involved.

Law enforcement is exploring three possible motives for the shooting, including the potential for a mass shooting, terrorism, or an unknown criminal agenda. Cartridges recovered from the crime scene suggest the use of two different bullet calibers, indicating the possible use of a pistol and a larger weapon like an assault rifle.

While the Swiss newspaper Tages-Anzeiger noted similarities between the cartridges found and those typically used with the Russian AK-74 assault rifle, police have refrained from commenting on this information. The Italian Prime Minister, Giorgia Meloni, identified the deceased Italian victim as Maria Spinelli, aged 22.