Copenhagen police launched an investigation into the explosion at a complex of tax administration buildings in the north of the capital, AP reported. 

"It is still too early to tell who might be the perpetrators, but we take this incident very seriously and have launched an extensive investigation. We neither can nor will accept an act like this one," Chief Police Inspector Jorgen Bergen Skov told reporters.

According to him, the blast took place on Tuesday evening in an area near the Nordhavn S-train station.

Police said that one person who was standing near the Nordhavn S-train station was slightly injured by debris and received treatment in an emergency room.