Two people, were injured, one seriously, when an object exploded Sunday outside a subway station in southern Stockholm, the capital of Sweden.
The area where the explosion took place was cordoned off while investigators scoured the scene around the Varby Gard station, Efe quoted police as saying.
The man, in his 60s, was taken to hospital but later died, while his companion, a woman in her mid-40s, received minor wounds to her face and both legs, Mr Olsson said.
Tabloids Aftonbladet and Expressen reported that the blast was thought to have been caused by a hand grenade, but police spokesman Sven-Erik Olsson declined to confirm the reports.
Originally investigated as a murder, police now do not believe the couple was targeted.
Mr Olsson added that it did not appear to have been an act of terrorism.
According to a Swedish police report published past year, Sweden is the European country where criminal gangs use the most grenades, often from stocks from the former Yugoslavia.
The Varby Gard station, in the Huddinge residential district in southwest Stockholm, was closed off for investigation.
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