A dog walker was mauled to death after being set upon while out walking a group of dogs in rural Surrey.
The 28-year-old woman, from London, was attacked in Caterham just before 14:45 GMT on Thursday.
A second woman who received treatment for dog bites has since been discharged from hospital.
Police said eight dogs were seized at the scene by officers and the owners of these dogs had been identified and were being kept informed of investigations.
The dogs were not believed to be banned breeds and the second woman was not thought to be linked to the woman who died, police said.
Officers investigating the attack have erected a cordon in the Gravelly Hill area, which is a quiet rural community.
No arrests have been made.
Insp Lyndsey Whatley said: "I would like to reassure residents that we are confident all the dogs involved are in the custody of police whilst we investigate the circumstances of what has happened."
East Surrey MP Claire Coutinho said her thoughts were with the loved ones of the woman who died.
She said: "Thank you to the paramedics for their efforts at the scene, and officers from Surrey Police who controlled the situation so quickly."
By Tom Pugh, BBC News, Caterham
Forensic work was being carried out on Friday as investigators tried to establish how the tragic events unfolded on Thursday.
A heavy police presence was being maintained at Gravelly Hill where a woman in her 20s lost her life and another was left needing hospital treatment.
It is apparent the investigation is being carried out at pace, with police telling reporters at a briefing that all the owners of the dogs involved have been identified.
And they were keen to offer reassurance to the local community that they were confident all the dogs involved had now been seized.
The area is within a quiet, rural setting with properties set within large grounds, and locals have expressed shock at the tragedy.
The woman who was attacked by the dog is yet to be named, but Surrey Police said her next of kin had been informed.
Ch Insp Alan Sproston said: "Our thoughts are with the family of the woman who sadly died.
"This incident will be concerning to the local community and I would like to reassure them that we believe all dogs have been accounted for and are in police custody.
"Our investigation to establish the circumstances of the incident remains ongoing and we would ask the community not to speculate."
Richard Bream, who runs the nearby Mardens Kennels, said he had never heard of a dog attack in the area before.
He said: "That particular area, View Point, is an area where professional dog walkers will turn up in their van and take the dogs out and walk them.
"I've always felt you see some of these dog walkers have five or six, and they shouldn't be able to do that."
A woman walking a border collie past one of the police cordons, who asked not to be named, said she was shocked by the incident.
She said: "It's a nice circular woodland walk and we've never had any issues before. It is so shocking. Normal dogs surely wouldn't do that."
Tandridge District Council leader Catherine Sayer said: "It's just a terrible, tragic incident. Obviously, our thoughts are with the family of the young woman who died and we very much hope for a quick recovery for the woman who was injured."
Talks are planned at the authority about the council's response to the attack, and it will be discussed at a meeting of the community services committee on Tuesday.
Follow BBC South East on Facebook, on Twitter, and on Instagram. Send your story ideas to southeasttoday@bbc.co.uk.
Woman killed in dog attack
Surrey Police
£10,000 project to drain Haslemere Town Meadow's marshy middle scrapped as bell tower repairs take priority
Epsom Town Hall evacuated as bomb squad called
Hampshire’s counter-terrorism units are put through paces – just in case…
Epsom Downs Racecourse: Crash between car and pedestrian
America will hear Tyre Nichols' screams for mother in video – lawyer
What we know about Tyre Nichols arrest video
Ukraine declares war on its other enemy – corruption
I forgave the Nazis who killed my family. Video
'Protesting for 20 years and still no equal rights'
Lured into India's get-rich-quick selling schemes
Weekly quiz: What was said about Doja Cat's Paris look?
How onions became a luxury in the Philippines
Africa's top shots: Welcome parties and malted brews
Is UK being left behind in global fight for investment?
A remedy for low motivation and passion
The 90s cop show that changed TV
How one volcano could make global chaos
© 2023 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.
