A man in his 40s has been arrested on suspicion of aggravated burglary after a suspected break in attempt in Bodmin.
The incident saw firearms officers called to an address on Kinsman Estate.
Officers from Devon and Cornwall Police were called just before 9.30am to reports of an incident on St Piran Close, where it was reported that a man broke in to a property, demanding mobile phones from the occupants.
The man had been reported to be carrying a knife, and a weapon was later recovered near to the address.
Police apprehended the individual at an address on Kinsman Estate in the town.
After a containment was put on an address, the man left of his own accord moments later.
A witness said they saw armed police surrounding the property, with members of the public being prevented from entering or leaving the area during the incident.
A spokesperson for Devon and Cornwall Police confirmed: "Police were called just before 9.30am today, October 24, following reports of an incident at an address in Bodmin.
"A man, believed to be in possession of a knife, had entered the property in St Pirans Close and made threats to the occupants, demanding mobile phones.
"The suspect left the scene. Firearms and local officers attended. A knife was recovered near to the address.
"Enquiries led officers to a property in the Kinsman Estate area of the town. A containment was placed on the address; a man left the property of his own accord a short time later.
"A man in his 40s was arrested on suspicion of aggravated burglary and remains in police custody."