A woman in her twenties has died and another is in hospital following reports of a dog attacking members of the public.
Surrey Police said officers were called to Gravelly Hill in Caterham at around 2.45pm on Thursday.
Armed officers attended with support from the National Police Air Service and detained seven dogs in total, which all remain in police care.
The woman in her 20s was pronounced dead at the scene, police said.
Formal identification has yet to take place, but her next of kin have been informed and are being supported by specialist officers.
Police said a second woman is in hospital receiving treatment for dog bites and her condition is not life-threatening.
Chief Inspector Alan Sproston said: “Our thoughts are with the family of the woman who sadly died this afternoon. 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.”
Several road closures are in place around Gravelly Hill and officers remain at the scene.