Police suspect explosive device set off blast at Sweden apartment building

Sept. 28 (UPI) -- Authorities believe an explosion at a Swedish apartment building on Tuesday -- which injured a number of people and started multiple fires -- was probably intentionally caused by a bomb-like device.

The blast occurred at the building in Gothenburg, which is located in far western Sweden about 250 miles southwest of Stockholm.

Officials said a 10-year-old boy is among the injured.

Police said they're investigating the explosion as a potential crime, but didn't specify any possible suspects.

The blast, which occurred early Tuesday, sparked fires throughout the building. Officials immediately evacuated the residents and the surrounding area.

Officials said at least four people were seriously injured.