Reports of a loud explosion on the north Cornwall and Devon border are being investigated. A number of residents reported hearing a loud bang between 1130 and 1200 BST around the Bude and Holsworthy area. Others said their homes were damaged.
Western Power and the British Geological Survey have carried out checks in the area.
Pc Baxter Proven of Devon and Cornwall Police said an investigation was under way into the cause.
He said: “One theory being considering is perhaps a military aircraft has broken the sound barrier a little too close to the land and that has caused this sonic boom and this, in turn, caused some light damage around the north Cornwall area.” – bbc