A man suspected of killing five people in Plymouth before turning the gun on himself has been named locally as Jake Davison.
Three females and two males were shot in the Keyham area of the city on Thursday evening.
Police said the incident, the worst mass shooting in Britain since 2010, is not terror-related.
Five people died at the scene and one died later in hospital. An MP has said one victim was a child.
Emergency services were called to Biddick Drive shortly after 18:00 BST on Thursday.
Devon and Cornwall Police said two females and the three males died at the scene, while one female died shortly after in hospital.
The force added: “The area has been cordoned off and police are not looking for anyone else in connection with the incident.”
Prime minister Boris Johnson tweeted: “My thoughts are with the friends and family of those who lost their lives and with all those affected by the tragic incident in Plymouth last night.
“I thank the emergency services for their response.”
Plymouth Sutton & Devonport MP Luke Pollard added it was “unspeakably awful” and he was “utterly devastated” to learn one of those killed was a child.
People were asked to stay inside and follow police advice as the emergency services responded.
Police and crime commissioner for Devon and Cornwall, Alison Hernandez would not comment on the ages of the victims and urged people not to share videos on social media.
“I think the sad thing for us is we have a community that many would have witnessed what occurred, right in front of their eyes, where they live,” she said.
“Absolutely devastated this morning.
“A lot of us are speechless.”
The last mass shooting in Britain happened in 2010 when taxi driver Derrick Bird killed 12 people in Cumbria.