A 61- year- old man was arrested following the discovery of items believed to be linked to the manufacture of explosives.
Rifles and pistols were also discovered during a raid at
10.20am on Saturday at a house in Station Street, Cheslyn Hay, Staffordshire.
An Army bomb disposal team was called and all the items are being examined by forensic specialists.
A Staffordshire Police spokesman said the raid was carried out under the Firearms Act by detectives from Cannock. He added: "A specialist police search adviser was also called. He found materials and property believed to be related to the manufacture of explosives.
"A large number of items was removed from the address, some of which have been sent to the Forensic Science Service for examination."
The house was cordoned off during the operation.
The man is being held at Cannock police station.