The PSNI has asked members of the public to avoid the Rivenwood area of Newtownards due to the discovery of what is believed to be a historic piece of munition.
Police are currently at the scene along with Ammunition Technical Officers investigating the matter and an initial cordon is currently in place.
Inspector McClintock said: “I am also asking the public to avoid the area during this time where possible. Updates will be provided in due course as the incident develops.
“I appreciate this may cause some disruption, however keeping people safe is paramount and we will not take any risks.
“I want to thank those who may be affected for their patience at this time.”