Three people have been released under investigation as police continue to appeal for witnesses to a bloody fight in Boultham Park.
As previously reported, a man in his 50s was slashed in the face with what police believe was a knuckleduster.
Police were called just before 7.30pm during the evening of Thursday, July 4 after receiving reports of an altercation between a number of people.
Two women and four men were initially arrested. Two men in their 20s and a man in his 40s were released on bail.
A man and two women, all in their 30s, were released with no further action.
Police revealed on Thursday, August 8 that the three people who were bailed have now been released under investigation.
People at the scene initially reported someone had been stabbed, but police later revealed more details about how the injuries were actually caused.
Detective Constable John Seal from Lincoln CID previously said: “A man in his 50s sustained lacerations to his face which police believe were caused by a knuckleduster.
“A man in his 20s sustained a small cut which was consistent with a knife wound.”
Police are still appealing for anyone who witnessed the incident and has not contacted them to do so via 101 or by emailing [email protected] quoting incident 392 of July 4.