Shortly before 4 a.m. police received a call claiming that an object that appeared to be a hand grenade was thrown into a house in a neighbourhood in the southern part of the town. Police sealed off an area of 150 metres around the scene and residents were told to leave heir houses.
Nobody was injured when the hand grenade was thrown in through the house’s kitchen window. According to local paper Östgöta Correspondenten’s website the family in the house had seen the assailants before they fled.
Police said late on Friday afternoon that they had arrested four men in their mid-20s on suspicion of criminal damage.
“The crime could be connected to the hand grenade attack on a house in Linköping,” a police press release said.
Police have not yet established a motive for the attack, although one theory mooted in the press on Friday was that it was part of a battle between far-left and far-right groups in the town. Police said in Friday that the theory was pure speculation.