Police were called early on Sunday morning following a report of an incident that took place in Helmsdale.
Emergency services rushed to the address to tend to a 20-year-old man who was found with multiple stab wounds.
He was treated at the scene but was taken to hospital where he is still in a serious condition.
A 19-year-old man has been arrested in connection with attempted murder and is currently being held in police custody.
Police have informed the public that they believe that this was an isolated attack and that they are not looking for anyone else in connection with their investigation as of yet.
Detective Inspector Warren Atkinson said, “A young man has suffered serious injuries and our thoughts are with him at this time.”
Anyone with any information should call 101 quoting log number 381 of 10 February.