The police bomb squad has been called to the scene.
– We can not fully confirm that it is a grenade, we have taken pictures and then the bomb squad has their say, says Martin Johansson at Örebro Police to SVT.
It was when Örebro bottom scraping association arranged magnetic fishing in Svartån that the find was made.
– This is what can happen when you magnetically fish, that you pick up old grenades, ammunition and such from the bottom, says the association’s chairman Mikael Larsson.