Two men were taken to hospital after neighbours reported sounds of gun shots in Gainsborough.
Police attended the property on High Street at around 11.20pm on Monday, December 10.
Several people were said to have been involved who police believe were known to each other.
A Lincolnshire Police spokesperson said: “Two men were taken to hospital. They were not seriously injured and have been discharged.
“Officers are carrying out investigations into this incident, believed to involve several individuals who are thought to be known to each other. No arrests have been made as yet and enquires are on-going.”
Police refused to comment further at the time of writing.
It is not clear if a weapon was recovered from the scene.
Anyone with any information should call 101, quoting incident number 482 of December 10.