A manhunt is underway after one person was killed and five others were injured in a shooting at an event in Switzerland.
According to Sky News, the shooting is believed to have happened at a rave, and some of the victims were seriously injured.
Police said "nighttime shots" were reported in Schachen, in Aarau, the capital of the northern Swiss canton of Aargau, and that a major operation has been launched.
The Aargau cantonal police urged the public to stay away from the area and said the local horse racing track, swimming pool and sports field have been cordoned off due to the ongoing operation.
Police spokesperson Pascal Wenzel told Swiss public broadcaster SRF that officers were alerted to the shooting around 2.30am local time (1.30am UK time).
At the time of the incident, the "Aarau Rave VOL. 7" was taking place at the horse racing track, SRF reported.
People at the rave initially mistook the shots for fireworks until somebody shouted "everyone down", according to Swiss daily Blick.
Police said the perpetrator's motives and the exact circumstances of the shooting were still unclear.
A 22-year-old woman died at the scene, police said, while four men and one woman, aged between 24 and 27, are in hospital with injuries ranging from minor to severe.
Switzerland has one of the highest rates of gun ownership in Europe although violent shootings are rare. In 2019, it approved tighter gun control rules.