During the clearing of roadside ditches near Sulimy, near Giżycko, North-East Poland, two large objects resembling unexploded ordnance were discovered. Sappers called onto the site identified them as probably German 28-cm Nebelwerfer shells.

Sappers from 15. Giżycka Brygada Zmechanizowana (15th Mechanised Division from Giżycko) were called to the site. They secured, extracted, and took away the unexploded ordnance for detonation, which was scheduled for the next day. It is believed that the objects were 28-cm rocket-propelled mortar shells for the World War 2 German Nebelwerfer mortar. The Nebelwerfer 41 weapon used 28/32-mm shells that were fired in groups of 6 with a maximum range of around 2200 metres. It is estimated that over such 600000 rockets and 700 launchers, were made during the war by the Germans.

(after 15. Giżycka Brygada Zmechanizowana & Onet)