A 28-year-old woman was walking a number of dogs when she was mauled to death, according to police.
Officers were called to Gravelly Hill in Caterham, Surrey, at 2.45pm on Thursday afternoon.
Despite efforts by paramedics, the victim, from London, was declared dead at the scene.
Specialist officers are supporting her next of kin.
A second woman who received treatment for dog bites has since left hospital.
A total of eight dogs were detained, and they remain in the custody of the police.
No arrests have been made.
Roads in the area remained cordoned off on Friday as forensic work continued, with only residents being allowed in and out.
Inspector Lyndsey Whatley of Surrey Police said: "Officers were called to Gravelly Hill in Caterham to reports of dogs attacking members of the public.
"Sadly, despite the best efforts of paramedics, a 28-year-old woman from London was sadly pronounced dead at the scene.
"The woman is believed to have been walking a number of dogs at the time of the incident.
"Her next of kin have been informed and will be supported by specialist officers."
The inspector went on: "This is a tragic incident where a young woman has sadly lost her life and our thoughts are with her family and friends.
"I know that these events will be of a real concern to the local community and I would like to reassure residents that we are confident that all the dogs involved are in the custody of police whilst we continue to investigate the circumstances of what has happened."
Claire Coutinho, the MP for East Surrey, said: "My thoughts are with the loved ones of the lady who has died following a dog attack in Caterham.
"Thank you to the paramedics for their efforts at the scene and officers from Surrey Police who controlled the situation so quickly."
Surrey County Council leader Tim Oliver said: "It's a terrible incident. It just sounds absolutely shocking and I'm sure that the police will be following it up.
"I don't know what can be done, but something needs to be done to prevent this from happening again, most certainly."