Three men arrested in connection with a shooting have been released on bail pending further enquiries.
The men, aged 21, 21 and 23, were arrested on suspicion of possession of a firearm with intent to endanger life.
Officers were called to Erewash Gardens, Top Valley, at about 10pm on Wednesday (July 17) following reports of gunshots.
A 17-year-old boy remains in hospital with injuries not believed to be life-threatening.
Detective Inspector Ruby Burrow said: "Our enquiries are ongoing and we've increased patrols in the area to provide reassurance to the local community.
"We believe this was a targeted attack. We're appealing for anyone who witnessed the incident or who saw anything suspicious in the area at the time to come forward as soon as possible.
"Please call Nottinghamshire Police on 101, quoting incident number 1070 of 17 July 2019, or call Crimestoppers anonymously on 0800 555 111."