An explosion damaged a police station in Copenhagen on Saturday, in the second explosion that hit the Danish capital in four days.
No one was injured in the explosion outside a Norrebro station just outside the city center, police said on Twitter.
On Tuesday, a person was slightly injured in an explosion outside the Danish Revenue Agency office, in what the police said was a deliberate attack.
The police told Reuters it was too early to tell if the two explosions were connected, but could not immediately comment further.
The police were looking for a man who was escaping from the explosion scene, said Ekstra Bladet.
Serious attacks or violence are rare in the small Nordic country of 5.7 million people who boast of a reputation for security and social tolerance.