Abroad
Veteran Member
Yuusuf was born in Birmingham and was on a family holiday to visit relatives in Sweden.
He was sleeping in the living room of a flat on Monday night when a grenade was thrown through the window.
He was in the same room as his nine-year-old sister Aisha and brother Ahmed, five.
Yuusuf died on the way to hospital. His brother and sister escaped serious injury.
Police spokesperson Ulla Brehm told Radio Sweden: "We have a big problem in this area of gang criminality. We have had shootings and violence in this area.
"We now have a small boy dead because of the escalation of violence in the area."
She added: "This is new to us. Before criminals have been shooting towards each other."
More than one person registered to the address was a convicted criminal, Ms Brehm said.
http://www.bbc.co.uk/news/uk-england-birmingham-37165121