The police were called in just after 8am on Wednesday after a call regarding an explosive device found in a central Malmö apartment building, wrote the Skånskan newspaper.
“The building was evacuated. Between forty and fifty people left the building and the whole area was cordoned off,” said Cindy Schönström-Larsson of the Skåne police.
Several police patrols, ambulances, and bomb technicians all descended on the scene in the southern Swedish town, and a robot was sent to investigate the explosive.
The technicians attempted to relocate the grenade, which the Sydsvenskan newspaper reported was live – with the pin pulled and the handle extended.
When the technicians did not succeed, they decided to detonate it on the scene just before 11.30am, wrote the paper.
Police have speculated how a grenade could have ended up in the location.
“The hand grenade may have been thrown from a car, and it may have been here for several days,” said Håkan Johansson of the police to Sydsvenskan.
Police explained that the controlled detonation was a safe operation, and that no one was injured in the process.
After the detonation, the nearby buildings were re-opened and residents returned home.