Two young children and a 30-year-old woman were rushed to hospital after being mauled by dogs in south east London.
Four dogs attacked the children, aged four and six, as well as the woman before 9am on Saturday on Mickleham Road in St Paul's Cray, north of Orpington.
The Met responded to calls and armed officers were dispatched to the scene whey they found the injured parties.
Police put the dogs in kennels and the woman was taken to hospital along with the two children.
A woman has been arrested on suspicion of having dogs dangerously out of control and she has been taken to custody.
It is understood that none of those injured are in a serious condition.
“We were called at 8.49am this morning (5 October) to reports of an incident in Mickleham Lane, Orpington,” a London Ambulance statement read.
“We sent a number of resources to the scene including ambulance crews, an advanced paramedic and an incident response officer.
“We also dispatched London’s Air Ambulance. We treated one adult and two children at the scene and took them all to a major trauma centre by road.”
Mickleham Road has been cordoned off by police to allow an investigation to take place.
"A woman has been arrested on suspicion of having dogs dangerously out of control and she has been taken into custody,” a police statement read.
“The dogs have also been taken to police kennels while the investigation is ongoing. Extra officers will be in the area over the next few days to provide community reassurance."
The statement added: "I know this incident will have caused a lot of public concern, especially due to the young age of the children injured.
“Fortunately, it is believed that none of the injuries are life-threatening.”
The incident came after a six-year-old girl was taken to hospital in West Sussex after being bitten by a Japanese Akita dog.
The attack happened in Strand Parade, The Boulevard, Durrington, Worthing, between 4pm and 4.30pm on Thursday.
A Sussex Police spokesman said that a 53-year-old woman from Worthing had been arrested on suspicion of being in charge of a dog dangerously out of control and causing injury.
