The operation is a joint mission between the governments of Nauru and Australia, carried out by the Australian Defence Force (ADF), the Nauru Police Force (NPF) and the Australian Federal Police (AFP).
A statement said this is the continuation of the first Operation Render Safe mission undertaken in Nauru in 2020.
Eight UXOs were safely and successfully disposed of at a secure site at Topside on Wednesday.
Three of which have been described by the Australian Defence Force (ADF) as dangerous.
