An explosion rocked a residential building in Gothenburg, Sweden early Tuesday morning sending at least 25 people to the hospital.

Footage shows thick, white smoke billowing from the block of flats on September 28.

A Sahlgrenska University Hospital spokesperson said three older women over 60 were seriously injured in the explosion.

Meanwhile, emergency services said hundreds of people in the vicinity of the blast and fire have been evacuated.

Police said they have opened investigations into the source of the explosion.

Footage shows shocked locals near the blast site in Gothenburg, Sweden as officers clear traffic after the explosion on Tuesday (September 28) morning.

A powerful explosion rocked a residential building in the area sending around 25 people to the hospital and forcing the evacuation of hundreds more.

A Sahlgrenska University Hospital spokesperson said three older women over 60 were seriously injured in the explosion.

Meanwhile, emergency services said hundreds of people in the vicinity of the blast and fire have been evacuated. Police said they have opened investigations into the source of the explosion.