From Devon & Cornwall Police:
Police and paramedics were called to an address in Robartes Road, St Dennis near St Austell, at around 8.25am on Saturday 6 April, following reports of a serious assault.
Officers attended the scene where a man was reported to be in possession of a knife. A Taser was discharged by officers in order to safely disarm the man.
A man in his 60s has been taken to Derriford hospital by land ambulance to be treated for serious injuries sustained prior to police arrival. He remains under police guard.
A woman in her 80s has been taken to Derriford hospital by air ambulance to be treated for serious injuries.
Police are not currently seeking anyone else in relation to this incident.
Emergency services remain at the scene and a cordon is in place.
Due to the circumstances of this incident it has been referred to the Independent Office of Police Conduct (IOPC) for their consideration.
Police are appealing for any witnesses and anyone with information to call 101 quoting log 201 of 6 April.