A “very young girl” was among those shot dead by a gunman who killed four other people in Plymouth before shooting himself, police have said.

Devon and Cornwall Police Chief Constable Shaun Sawyer said the girl was shot dead by 22-year-old Jake Davison, while two people remain in hospital with “significant injuries”.

Speaking at a press conference, he said there were a “considerable” number of phone calls to emergency services and that police arrived at the scene within six minutes.

He confirmed Davison “murdered a woman” known to him at an address.

“He knew people on that street,” he said.

Police also confirmed a woman, the girl and two men were found dead at the scene in Keyham on Thursday evening – along with Davison who is believed to be the suspected offender.

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All are believed to have died from gunshot wounds.

Another woman who was treated at the scene, also for gunshot wounds, died later in hospital.

Police have named the suspected gunman as named the suspect as Davison, who is thought to have killed all others before turning his weapon on himself.

In videos shared online just weeks before the massacre, he spoke of being “beaten down” and “defeated by life”.

Davison, who posted on a YouTube channel under the name Professor Waffle, said he did not have “any willpower to do anything anymore” in a recording dated 28 July.

In several clips, he referred to the “incels” – an abbreviation online for “involutory celibacy”, the online subculture that involves men who are unable to find a romantic or sexual partner despite desiring one, often expressing hostility and extreme resentment towards those who are sexually active, particularly women.

Although saying he did not “clarify” himself as an “incel”, Davison talked about “people similar to me have had nothing but themselves”.

Luke Pollard, MP for Plymouth Sutton and Devonport, earlier confirmed on Twitter that one of the victims was a child under 10, and said he was “utterly devastated”.

He also said that more people were being treated for their injuries in hospital.

Officers were called to Biddick Drive at about 6.10pm following reports of a shooting.

South Western Ambulance Service said Hazardous Area Response Teams, multiple ambulances, air ambulances, multiple doctors and senior paramedics were also sent to the scene.

Police declared a “critical incident” but stressed the shooting was not terror-related and they are not looking for anyone else in connection with what happened.

The next of kin of those who died have been informed.

Neighbours reported hearing very loud gunshots and some members of the public told Sky News it sounded like a bomb was going off.

Forensic experts have been pictured carrying out investigations at the crime scene on Friday morning. They have been doing fingertip searches, bagging up evidence and taking pictures.

Prime Minister Boris Johnson has reacted to the news, saying his “thoughts are with the friends and family of those who lost their lives and with all those affected”.

He also thanked the emergency services for their response to the incident.

Home Secretary Priti Patel described the incident in the Devon city as “shocking” and said her thoughts were with all those affected.

Johnny Mercer, MP for Plymouth, Moor View, condemned the shooting as an “appalling act of violence” and told Sky News it will have “far-reaching effects throughout the community”.

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