Six people, including a suspected gunman, have died in a shooting incident in Plymouth, about 230 miles southwest from London.
Devon and Cornwall Police said three females, two males and the suspect had died in the Keyham area of the city on Thursday evening.
One of the dead was a child under 10, according to an MP, but the shooting is not terror-related, police confirmed.
An eyewitness who wished not to share her name said what happened was “horrendous and so sad”.
“Firstly, there was shouting, followed by gunshots – three possibly four to begin with,” she said.
“This was when the shooter kicked in the door of a house and randomly started shooting. He ran from the house shooting as he ran and proceeded to shoot at a few people in the linear park up from the drive.”
She said the “shooter proceeded along Royal Navy Avenue still shooting”.
Another witness said he “walked around the corner” and “bumped into a bloke with a shotgun”. He said the man was dressed all in black.
In a statement, Devon and Cornwall Police said two females and the three males died at the scene, while one female died shortly after in hospital.
It added: “The area has been cordoned off and police are not looking for anyone else in connection with the incident.”
Plymouth Sutton & Devonport MP Luke Pollard said the incident was “unspeakably awful” and that he was “utterly devastated” to learn one of those killed was a child.
This is the worst mass shooting in the UK for more than a decade. The last mass shooting in Britain happened in 2010 when a taxi driver killed 12 people in Cumbria.
Home Secretary Priti Patel tweeted: “The incident in Plymouth is shocking and my thoughts are with those affected.
“I have spoken to the chief constable and offered my full support.
“I urge everyone to remain calm, follow police advice and allow our emergency services to get on with their jobs.”
While gun-related homicides are rare in the United Kingdom. A mass shooting in 1996 prompted the country’s government to tighten gun laws and ban private gun ownership.