Shots were fired at a Copenhagen synagogue, Danish police said late Saturday night.
Police say one person was shot in the head and two policemen were injured by gunfire before the shooter fled by foot.
However, police said it was too early to link the synagogue shooting to Saturday's shooting that left one dead and three wounded.
Danish television station TV2 said a large metro and train station nearby, Norreport, was being evacuated.
A civilian was killed and three police were wounded on Saturday in a shooting at a meeting in Copenhagen attended by Lars Vilks, an artist who has received death threats since publishing images of the Prophet Mohammed.
Danish police said Wilks was the target of the attack. They added in a statement that they were looking for two perpetrators in dark clothing who drove away in a dark Volkswagen Polo that had been carjacked. The car was later found, and after further interviews with witnesses, police said they were looking only for one suspect, not two.
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.
Denmark's security service, PET, said the circumstances surrounding the shooting "indicate that we are talking about a terror attack."
This is a developing story.