Police have recovered firearms and ammunition during a search operation in Cookstown.
A member of the public raised concerns about objects he had discovered at Tullyveagh Road on Friday.
PSNI Detective Inspector Will Tate said: "The items we have recovered include several rounds of ammunition and a handgun.
"The condition of the items and other evidence gathered at the scene would suggest they have been buried at that location for many years."
They have been sent for forensic testing.