An explosion shook Östermalm, a central district in Stockholm, on Saturday evening.

The blast, which occurred near an entrance on Grevgatan, caused significant material damage but no reported injuries.

Witnesses described the sound as extremely loud, with some residents saying their buildings shook.

Glass shards were scattered across the street and nearby vehicles.

Police, firefighters, and ambulances quickly arrived at the scene, cordoning off the area.

Authorities are investigating the incident as public endangerment and a violation of explosive materials laws.

The cause of the explosion remains unclear, and forensic experts are examining the site.