Three women have been “rescued” from a south London house as police investigate claims they were held as slaves for at least 30 years.
Police arrested a 67-year-old man and a 67-year-old woman in Lambeth.
Last month officers were contacted by Freedom Charity after it received a call from a woman saying she had been held against her will for decades.
A Malaysian woman, 69, an Irish woman, 57, and a British woman, 30, were all rescued from the house.
The women, who are said to be “highly traumatised”, are now in safe accommodation.
Police said they were not related to each other and the 30-year-old had spent her whole life in servitude. Officers are trying to establish whether she was born in the house.
Det Insp Kevin Hyland, from the Metropolitan Police’s Human Trafficking Unit, said: “We have seen some cases when people have been held for 10 years, but we have never seen anything of this magnitude before.”
He added that the women had controlled lives and spent most of it indoors, but they had some freedom.
Police said the facts behind the situation were being slowly established as specialist workers were assisting the women. Officers said there was no evidence of sexual abuse.
“We applaud the actions of Freedom Charity and are working in partnership to support these victims who appear to have been held for over 30 years,” Mr Hyland said.
“We have launched an extensive investigation to establish the facts surrounding these very serious allegations.
“A television documentary on forced marriages relating to the work of Freedom Charity was the catalyst that prompted one of the victims to call for help and led to their rescue.”
Speaking to the BBC, Aneeta Prem, founder of Freedom Charity, said they charity were investigating how the women had remained hidden for so long.
“In a very busy capital city we often don’t know our neighbours. We’re looking at people who were kept against their will in an ordinary residential street in central London,” she said.
She added that the women were extremely brave to pick up the phone and contact the charity. The alleged victims were able to walk out of the house after receiving help.