A man and a teenager have been arrested for an alleged assault at a house in New Street, Aylesbury.
A 39-year-old man suffered head and body injuries.
Police were called to the home at 8am on Sunday morning.
A 38-year-old man and 17-year-old boy were arrested on suspicion of causing actual bodily harm and have been bailed until September 22.
Twitter user Dexter Morgan wrote: “Police forensics outside house in New Street Aylesbury. Blood everywhere!”