A further man has been arrested in connection with a reported assault at a house on Buckingham Street in Hull on Saturday 6 July.
The two people arrested previously remain in custody.
Police were called shortly before 10.30pm with reports that a man had been found in Buckingham Street after he had been allegedly assaulted. The man sustained a serious head injury and remains in a critical but stable condition in hospital.
Anyone with any information, that has not already spoken to authorities, is asked to call 101 quoting log 767 of 06/07/19 or Crimestoppers anonymously on 0800 555 111.