A man was found dead at an address on Hermit Street in Lincoln. The incident is being treated as unexplained.
Emergency services and police were called to the property off Portland Street at 10.51am on Friday, May 9.
The man was pronounced dead at the scene. His age has not been established yet.
Two men are reported to have fled from the premises prior to officers’ arrival at the scene.
Police are appealing for witnesses to come forward.
DI Suzanne Davies said: “I would like to appeal to these men to come forward to Lincoln Police Station to assist with our enquiries.
“We also want to speak to anyone else in the area who has seen any activity that could be connected to this incident or has any information that could help us understand the circumstances of the death.”
Anyone with information is urged to call 101 quoting incident number 157 of May 9.