A Cleveland Police spokeswoman said the 22-year-old man arrested in connection with the incident has been released on bail.
The injured man remains in an induced coma in hospital, police confirmed.
Officers say they have been searching for all evidence from the scene. It is unclear whether they have found the missing penis.
More top news
Alan Shearer and a host of other people have taken to Twitter to pay tribute to the Newcastle United's former tea-lady Kath Cassidy.
Former defender Woodgate has rejoined the Premier League club as first-team coach
Kath Cassidy served the club for more than 50 years and became a popular figure with managers, players and the media