A powerful explosion in a residential area of Tyresö, southeast of Stockholm, has left a woman seriously injured.

The blast occurred in a multi-family building in Bollmora, shattering windows and damaging a doorway.

Police have launched a major operation, including the use of helicopters, to track down suspects reportedly seen near the scene.

Bomb technicians are investigating, and a preliminary inquiry into gross public destruction has been opened.

Residents describe the incident as deeply unsettling, with one witness recounting how her balcony shook from the force of the explosion.

Authorities have assured that there is no structural risk to the building, but the community remains on edge as the investigation continues.