Police have said they will take no further action against two of the suspects in the Willoughby Road assault case which took place on Monday, January 18.
The decision was made over a male and a female arrested as part of the investigation.
A second female has been bailed until February 1, while further enquiries are carried out.
Officers wee called to the address at 4.15am on MOnday and access to Willoughby Road from Hospital Lane was closed while an investigation took place.
The victim was taken first to Pilgrim Hospital and then to Queen’s Medical Centre, in Nottingham.
Anyone with information should call Lincolnshire Police non-emergency number 101, quotng incident 32 of January 18.