A man was rushed to hospital after suffering a single stab wound to his chest.
Around six police crews went to a home in Rucklers Lane, Kings Langley, just before 9.30am on Wednesday, following concerns for the welfare of a man outside the property.
The man, aged in his 40s and from London, was taken to Watford General Hospital by ambulance. He has since been transferred to St Mary’s Hospital in Paddington and police say he is in a ‘serious condition’.
Officers are investigating the circumstances of incident, but it is being treated as non-suspicious and no-one else is being sought in connection with the stabbing.
Anyone with information is asked to contact Herts Constabulary on the non-emergency number 101.