A gunman fired on a cafe in Copenhagen as it hosted a free speech event Saturday, killing one man, Danish police said. The event was organized by Swedish artist Lars Vilks, who has faced numerous threats for caricaturing the Prophet Muhammad.

Danish police said the gunman shot through the windows of the Krudttoenden cafe, which the TV2 news channel said were riddled with some 30 bullet holes. Helle Merete Brix, one of the event's organizers, told The Associated Press that Vilks was at the meeting but was not hit.

"I saw a masked man running past," Brix said. "I clearly consider this as an attack on Lars Vilks."

Police were looking for the perpetrators, who they said drove away in a dark Volkswagen Polo after the shooting, which took place shortly before 4 p.m. (1500 GMT, 10 a.m. EST).

In a statement, Danish police said the victim was a 40-year-old man inside the cafe attending the event. He has not yet been identified.

Police spokesman Henrik Blandebjerg said three police colleagues at the event were also shot.

"I heard someone firing with an automatic weapons and someone shouting. Police returned the fire and I hid behind the bar. I felt surreal, like in a movie," Niels Ivar Larsen, one of the speakers at the event, told the TV2 channel.

Brix said she was ushered away with Vilks by one of the Danish police guards that he gets whenever he is in Denmark.

The cafe in northern Copenhagen, known for its jazz concerts, was hosting an event titled "Art, blasphemy and the freedom of expression" when the shots were fired.

Franois Zimeray, the French ambassador to Denmark who was at the conference, tweeted that he was "still alive."

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Shooting targets free speech event in Denmark, killing one