A 60-year-old man has died in the Swedish capital Stockholm after picking up an object outside an underground station which exploded, police say.
A 45-year-old woman was injured in the blast, which police said was not believed to be terror-related.
The object was probably a hand grenade, according to police investigator Lars Bröms, who said technical experts were examining the debris.
The blast occurred at Varby gard station in Huddinge, a southern suburb.
The man died later in hospital. The woman suffered injuries to her face.
There was no indication the couple were targeted, police said.