By Alexander Smith, NBC News

(NBC) - Three women were rescued from a south London house where they were believed to have been held captive for more than 30 years, police said Thursday.

A man and a woman, both 67, were arrested "as part of an investigation into slavery and domestic servitude," the city's Metropolitan Police said in a statement.

Officers rescued a 69-year-old Malaysian woman, 57-year-old Irish woman, and 30-year-old British woman after receiving a call in October from a domestic abuse non-profit called Freedom Charity.

"All three women, who were highly traumatized, were taken to a place of safety where they remain," the statement added.

"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," Detective Inspector Kevin Hyland, from the Met's Human Trafficking Unit said.

"We have launched an extensive investigation to establish the facts surrounding these very serious allegations."
Hyland said a documentary on forced marriages relating to the work of Freedom Charity had prompted one of the women to call for help, claiming she had been held against her will in the house for 30 years.

The Met statement added: "Further enquiries by police revealed the location of the house and with the help of sensitive negotiations conducted by the charity the three women."