At least one gunman opened fire Saturday on a Copenhagen cafe, killing one man in what authorities called a likely "terror attack" during a free speech event organised by an artist who had caricatured the Prophet Muhammad.
The shooting, which also wounded three police officers, came a month after extremists killed 12 people at a satirical newspaper in Paris that had also sparked Muslim outrage with its depictions of Muhammad.
Swedish artist Lars Vilks, who has been repeatedly threatened after depicting Muhammad as a dog in 2007, organised and attended Saturday's event but was not hit by gunfire, police said.
There was no immediate claim of responsibility for the shooting, which took place shortly before 4 p.m. (1500 GMT).
Denmark's security service, PET, said the circumstances surrounding the shooting "indicate that we are talking about a terror attack."
Danish police said the gunman used an automatic weapon to shoot through the windows of the Krudttoenden cafe, which TV footage showed were riddled with bullet holes.
The gunman then fled in a carjacked Volkswagen Polo that was found later a few kilometres (miles) away, police said.
Police initially said there were two gunmen but later said they believed there was only one shooter, and described him as 25-30 years old with an athletic build, and carrying a black automatic weapon.
The Copenhagen event, titled "Art, blasphemy and freedom of expression" featured a panel discussion about freedom of speech in the wake of the January 7 massacre at the Charlie Hebdo paper in Paris.
Danish police said the victim Saturday was a 40-year-old man who was inside the cafe attending the event.
He has not yet been identified.
