Copenhagen Police said on Thursday afternoon that the three young men who were found dead in a Frederiksberg apartment were killed by gun shots.
“Both a hunting rifle and a pistol were used in connection with the killings. No weapons were found in the apartment so it is assumed that there were removed in connection with the killings,” a police press release said.
Police are treating the case as a triple homicide.
The three victims were aged 19, 23 and 24. Media reports have stated that all three had ties to gangs and that two of them were recently involved in a criminal case involving weapons possession and illegal drug sales. The 24-year-old was also reported to be a member or supporter of the biker gang Bandidos.
The three young men's names have been circulating on social media, but Copenhagen Police have not confirmed their identities.
Police said that it appeared as if the men had been killed in their sleep.
It remains unclear if more than one person was involved in the murders, but police said that a witness saw two men were seen on a scaffolding outside the building shortly before 4am. Those two men later drove away in a dark vehicle.
Police are asking for potential witnesses to come forward and said that no additional information would be released at this time.
Frederiksberg is a generally wealthy part of the Danish capital that is its own municipality despite being surrounded by Copenhagen on all sides. It has a population of just over 100,000.