Police spokesman Fredrik Bratt said: "We get calls from several people who have heard shots in central Trelleborg".
A major police operation is underway.
Trelleborg, known for its past gang violence, is located 33 kilometres south of Malmo and 64kms southeast of Copenhagen, Denmark. "There are several people who have experienced confirmed gunshot wounds", a statement issued by Police Skåne read. "But we are at the scene and investigating". "We saw someone running outside", an eyewitness told the Swedish publication Expressen.
Reports of gunman opening fire on civilians in Trelleborg, Sweden. It's packed with police cars in the street'.
"I was at home at the computer when I heard a loud bang", Aron Tydén - another person in the area - told the publication, claiming that he heard people running.
"We are blocking certain areas and will conduct an investigation". "I just heard shots and a lot of screaming".
At least four people have been taken to hospital, local media report.
"Forensics and gun dogs have been ordered to the site".